diff --git a/build/macosx/Arduino.xcodeproj/project.pbxproj b/build/macosx/Arduino.xcodeproj/project.pbxproj
index 4fc576493..08b49a6b5 100644
--- a/build/macosx/Arduino.xcodeproj/project.pbxproj
+++ b/build/macosx/Arduino.xcodeproj/project.pbxproj
@@ -13,19 +13,6 @@
 			buildPhases = (
 				33ACA202097AF31C00BEC3A2 /* ShellScript */,
 			);
-			buildSettings = {
-				OPTIMIZATION_CFLAGS = "";
-				OTHER_CFLAGS = "";
-				OTHER_LDFLAGS = "";
-				OTHER_REZFLAGS = "";
-				PRODUCT_NAME = Distribute;
-				SECTORDER_FLAGS = "";
-				WARNING_CFLAGS = (
-					"-Wmost",
-					"-Wno-four-char-constants",
-					"-Wno-unknown-pragmas",
-				);
-			};
 			dependencies = (
 				33ACA1F8097AF14400BEC3A2 /* PBXTargetDependency */,
 			);
@@ -43,19 +30,6 @@
 				33FF071D0965C1C20016AC38 /* CopyFiles */,
 				33FF07170965BFFE0016AC38 /* ShellScript */,
 			);
-			buildSettings = {
-				OPTIMIZATION_CFLAGS = "";
-				OTHER_CFLAGS = "";
-				OTHER_LDFLAGS = "";
-				OTHER_REZFLAGS = "";
-				PRODUCT_NAME = Arduino;
-				SECTORDER_FLAGS = "";
-				WARNING_CFLAGS = (
-					"-Wmost",
-					"-Wno-four-char-constants",
-					"-Wno-unknown-pragmas",
-				);
-			};
 			dependencies = (
 			);
 			name = Setup;
@@ -74,24 +48,6 @@
 				33AF61670965C4C600B514A9 /* Frameworks */,
 				33CF03C809662DA200F2C9A9 /* CopyFiles */,
 			);
-			buildSettings = {
-				JAVA_COMPILER = /usr/bin/javac;
-				JAVA_COMPILER_FLAGS = "";
-				JAVA_ONLY = YES;
-				JAVA_SOURCE_SUBDIR = .;
-				OPTIMIZATION_CFLAGS = "";
-				OTHER_CFLAGS = "";
-				OTHER_LDFLAGS = "";
-				OTHER_REZFLAGS = "";
-				PRODUCT_NAME = App;
-				SECTORDER_FLAGS = "";
-				WARNING_CFLAGS = (
-					"-Wmost",
-					"-Wno-four-char-constants",
-					"-Wno-unknown-pragmas",
-				);
-				WRAPPER_EXTENSION = app;
-			};
 			dependencies = (
 				33AF61710965C51E00B514A9 /* PBXTargetDependency */,
 			);
@@ -255,23 +211,6 @@
 		33FF07FD0965C3560016AC38 /* targets in CopyFiles */ = {isa = PBXBuildFile; fileRef = 33FF07D50965C3560016AC38 /* targets */; };
 /* End PBXBuildFile section */
 
-/* Begin PBXBuildStyle section */
-		33AF609C0965C4B700B514A9 /* Development */ = {
-			isa = PBXBuildStyle;
-			buildSettings = {
-				COPY_PHASE_STRIP = NO;
-			};
-			name = Development;
-		};
-		33AF609D0965C4B700B514A9 /* Deployment */ = {
-			isa = PBXBuildStyle;
-			buildSettings = {
-				COPY_PHASE_STRIP = YES;
-			};
-			name = Deployment;
-		};
-/* End PBXBuildStyle section */
-
 /* Begin PBXContainerItemProxy section */
 		33ACA1F7097AF14400BEC3A2 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
@@ -993,12 +932,6 @@
 		33FFFD3F0965B1E40016AC38 /* Project object */ = {
 			isa = PBXProject;
 			buildConfigurationList = 33FFFD400965B1E40016AC38 /* Build configuration list for PBXProject "Arduino" */;
-			buildSettings = {
-			};
-			buildStyles = (
-				33AF609C0965C4B700B514A9 /* Development */,
-				33AF609D0965C4B700B514A9 /* Deployment */,
-			);
 			hasScannedForEncodings = 0;
 			mainGroup = 33FFFD3D0965B1E40016AC38;
 			productRefGroup = 33FFFD3D0965B1E40016AC38;
@@ -1228,6 +1161,7 @@
 				33ACA1FD097AF16500BEC3A2 /* work */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = work;
 		};
 		33AF616B0965C4CB00B514A9 /* Build configuration list for PBXApplicationTarget "App" */ = {
 			isa = XCConfigurationList;
@@ -1235,6 +1169,7 @@
 				33AF616C0965C4CB00B514A9 /* work */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = work;
 		};
 		33FFFD400965B1E40016AC38 /* Build configuration list for PBXProject "Arduino" */ = {
 			isa = XCConfigurationList;
@@ -1242,6 +1177,7 @@
 				33FFFD410965B1E40016AC38 /* work */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = work;
 		};
 		33FFFE1F0965BC300016AC38 /* Build configuration list for PBXAggregateTarget "Setup" */ = {
 			isa = XCConfigurationList;
@@ -1249,6 +1185,7 @@
 				33FFFE200965BC300016AC38 /* work */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = work;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/readme.txt b/readme.txt
index 70a05b367..17e74a9e2 100644
--- a/readme.txt
+++ b/readme.txt
@@ -32,15 +32,20 @@ Arduino board and point the Windows Add Hardware wizard to the FTDI USB Drivers
 directory.
 
 On the Mac, mount the FTDIUSBSerialDriver_v2_0_1.dmg disk image and run the
-included FTDIUSBSerialDriver.pkg.
-
-Also, on the Mac, run the macosx_setup.command (after moving the Arduino
-distribution to your /Applications folder). It corrects permission on a few
-files for use with the serial port and will prompt you for your password. You
-may need to reboot after running this script.
+included FTDIUSBSerialDriver.pkg.  Also run the macosx_setup.command (after
+moving the Arduino distribution to your /Applications folder). It corrects
+permission on a few files for use with the serial port and will prompt you
+for your password. You may need to reboot after running this script.
 
 UPDATES
 
+0005
+
+Fixed bug that sometimes caused uploading of old versions of a sketch.
+Serial monitor nows include an interface to send messages to the Arduino
+board.  Pressing return appends a newline, pushing the send button doesn't.
+Now displaying "burning bootloader..." and "compiling..." status messages.
+
 0004 - 2006.04.26
 
 Main sketch is now compiled as C++ (instead of C).
diff --git a/targets/arduino/WConstants.h b/targets/arduino/WConstants.h
index f37946077..3e19ac44a 100644
--- a/targets/arduino/WConstants.h
+++ b/targets/arduino/WConstants.h
@@ -1 +1 @@
-#include "wiring.h"
\ No newline at end of file
+#include "wiring.h"
diff --git a/targets/arduino/timer.c b/targets/arduino/timer.c
index 5f23d3669..5b3c767ae 100755
--- a/targets/arduino/timer.c
+++ b/targets/arduino/timer.c
@@ -14,6 +14,8 @@
 //		which can be found at http://www.gnu.org/licenses/gpl.txt
 //
 //*****************************************************************************
+//
+// Modified by David A. Mellis, 9 July 2006.
 
 #ifndef WIN32
 	#include <avr/io.h>
@@ -57,7 +59,7 @@ void delay_us(unsigned short time_us)
 
 	// one loop takes 5 cpu cycles 
 	for (i=0; i < delay_loops; i++) {};
-}
+}
 */
 /*
 void delay_ms(unsigned char time_ms)
@@ -76,7 +78,7 @@ void delay_ms(unsigned char time_ms)
                   :"r"(time_ms), "r"((unsigned short) (delay_count))
 	);
 }
-*/
+*/
 /*
 void timerInit(void)
 {
@@ -94,7 +96,7 @@ void timerInit(void)
 	// enable interrupts
 	sei();
 }
-*/
+
 void timer0Init()
 {
 	// initialize timer 0
@@ -104,7 +106,7 @@ void timer0Init()
 
 	timer0ClearOverflowCount();				// initialize time registers
 }
-
+*/
 void timer1Init(void)
 {
 	// initialize timer 1
@@ -125,13 +127,13 @@ void timer2Init(void)
 	timer2ClearOverflowCount();				// initialize time registers
 }
 #endif
-
+/*
 void timer0SetPrescaler(u08 prescale)
 {
 	// set prescaler on timer 0
 	outb(TCCR0, (inb(TCCR0) & ~TIMER_PRESCALE_MASK) | prescale);
 }
-
+*/
 void timer1SetPrescaler(u08 prescale)
 {
 	// set prescaler on timer 1
@@ -145,13 +147,13 @@ void timer2SetPrescaler(u08 prescale)
 	outb(TCCR2, (inb(TCCR2) & ~TIMER_PRESCALE_MASK) | prescale);
 }
 #endif
-
+/*
 u16 timer0GetPrescaler(void)
 {
 	// get the current prescaler setting
 	return (pgm_read_word(TimerPrescaleFactor+(inb(TCCR0) & TIMER_PRESCALE_MASK)));
 }
-/*
+
 u16 timer1GetPrescaler(void)
 {
 	// get the current prescaler setting
@@ -188,7 +190,7 @@ void timerDetach(u08 interruptNum)
 		// set the interrupt function to run nothing
 		TimerIntFunc[interruptNum] = 0;
 	}
-}
+}
 */
 /*
 u32 timerMsToTics(u16 ms)
@@ -206,8 +208,8 @@ u16 timerTicsToMs(u32 tics)
 	// calculate the number of milliseconds in x timer tics
 	return (tics*1000*(prescaleDiv*256))/F_CPU;
 }
-*/
-
+*/
+/*
 void timerPause(unsigned short pause_ms)
 {
 	// pauses for exactly <pause_ms> number of milliseconds
@@ -232,10 +234,10 @@ void timerPause(unsigned short pause_ms)
 
 	// loop until time expires
 	while( ((TimerPauseReg<<8) | inb(TCNT0)) < (pause+timerThres) )
-	{
-		// DAM: these lines (in particular, the call to set_sleep_mode)
-		// caused avr-gcc to give an error about a misplaced } in linux,
-		// presumambly caused by a macro somewhere.  Since they're not
+	{
+		// DAM: these lines (in particular, the call to set_sleep_mode)
+		// caused avr-gcc to give an error about a misplaced } in linux,
+		// presumambly caused by a macro somewhere.  Since they're not
 		// vital (and are causing problems), I'm commenting them out.
 		//if( TimerPauseReg < (pause>>8));
 		//{
@@ -245,16 +247,14 @@ void timerPause(unsigned short pause_ms)
 		//}
 	}
 
-	/* old inaccurate code, for reference
+	// old inaccurate code, for reference
 	
 	// calculate delay for [pause_ms] milliseconds
-	u16 prescaleDiv = 1<<(pgm_read_byte(TimerPrescaleFactor+inb(TCCR0)));
-	u32 pause = (pause_ms*(F_CPU/(prescaleDiv*256)))/1000;
+	//u16 prescaleDiv = 1<<(pgm_read_byte(TimerPrescaleFactor+inb(TCCR0)));
+	//u32 pause = (pause_ms*(F_CPU/(prescaleDiv*256)))/1000;
 	
-	TimerPauseReg = 0;
-	while(TimerPauseReg < pause);
-
-	*/
+	//TimerPauseReg = 0;
+	//while(TimerPauseReg < pause);
 }
 
 void timer0ClearOverflowCount(void)
@@ -269,7 +269,7 @@ long timer0GetOverflowCount(void)
 	// (this is since the last timer0ClearOverflowCount() command was called)
 	return Timer0Reg0;
 }
-
+*/
 #ifdef TCNT2	// support timer2 only if it exists
 void timer2ClearOverflowCount(void)
 {
@@ -282,7 +282,7 @@ long timer2GetOverflowCount(void)
 	// return the current timer overflow count
 	// (this is since the last timer2ClearOverflowCount() command was called)
 	return Timer2Reg0;
-}
+}
 */
 #endif
 
@@ -403,7 +403,7 @@ void timer1PWMBSet(u16 pwmDuty)
 	//outp( (pwmDuty&0x00FF), OCR1BL);	// set the low 8bits of OCR1B
 	OCR1B = pwmDuty;
 }
-
+/*
 //! Interrupt handler for tcnt0 overflow interrupt
 TIMER_INTERRUPT_HANDLER(SIG_OVERFLOW0)
 {
@@ -416,7 +416,7 @@ TIMER_INTERRUPT_HANDLER(SIG_OVERFLOW0)
 	if(TimerIntFunc[TIMER0OVERFLOW_INT])
 		TimerIntFunc[TIMER0OVERFLOW_INT]();
 }
-
+*/
 //! Interrupt handler for tcnt1 overflow interrupt
 TIMER_INTERRUPT_HANDLER(SIG_OVERFLOW1)
 {
@@ -438,6 +438,7 @@ TIMER_INTERRUPT_HANDLER(SIG_OVERFLOW2)
 #endif
 
 #ifdef OCR0
+/*
 // include support for Output Compare 0 for new AVR processors that support it
 //! Interrupt handler for OutputCompare0 match (OC0) interrupt
 TIMER_INTERRUPT_HANDLER(SIG_OUTPUT_COMPARE0)
@@ -446,6 +447,7 @@ TIMER_INTERRUPT_HANDLER(SIG_OUTPUT_COMPARE0)
 	if(TimerIntFunc[TIMER0OUTCOMPARE_INT])
 		TimerIntFunc[TIMER0OUTCOMPARE_INT]();
 }
+*/
 #endif
 
 //! Interrupt handler for CutputCompare1A match (OC1A) interrupt
diff --git a/targets/arduino/wiring.c b/targets/arduino/wiring.c
index 5a6da0e63..9f7d90c54 100755
--- a/targets/arduino/wiring.c
+++ b/targets/arduino/wiring.c
@@ -1,6 +1,6 @@
 /*
-  wiring.c - Wiring API Partial Implementation
-  Part of Arduino - http://arduino.berlios.de/
+  wiring.c - Partial implementation of the Wiring API for the ATmega8.
+  Part of Arduino - http://www.arduino.cc/
 
   Copyright (c) 2005-2006 David A. Mellis
 
@@ -48,6 +48,10 @@
 
 #include "wiring.h"
 
+// The number of times timer 0 has overflowed since the program started.
+// Must be volatile or gcc will optimize away some uses of it.
+volatile unsigned long timer0_overflow_count;
+
 // Get the hardware port of the given virtual pin number.  This comes from
 // the pins_*.c file for the active board configuration.
 int digitalPinToPort(int pin)
@@ -315,19 +319,30 @@ void print(const char *format, ...)
 }
 */
 
+TIMER_INTERRUPT_HANDLER(SIG_OVERFLOW0)
+{
+	timer0_overflow_count++;
+}
+
 unsigned long millis()
 {
-	// timer 0 increments every timer0GetPrescaler() cycles, and
-	// overflows when it reaches 256.  we calculate the total
-	// number of clock cycles, then divide by the number of clock
-	// cycles per millisecond.
-	return (unsigned long) timer0GetOverflowCount() *
-		timer0GetPrescaler() * 2UL / (F_CPU / 128000UL);
+	// timer 0 increments every 8 cycles, and overflows when it reaches 256.
+	// we calculate the total number of clock cycles, then divide by the
+	// number of clock cycles per millisecond.
+	//return timer0_overflow_count * 8UL * 256UL / (F_CPU / 1000UL);
+	
+	// calculating the total number of clock cycles overflows an
+	// unsigned long, so instead find 1/128th the number of clock cycles
+	// and divide by 1/128th the number of clock cycles per millisecond.
+	return timer0_overflow_count * 8UL * 2UL / (F_CPU / 128000UL);
 }
 
 void delay(unsigned long ms)
 {
-	timerPause(ms);
+	unsigned long start = millis();
+	
+	while (millis() - start < ms)
+		;
 }
 
 /* Delay for the given number of microseconds.  Assumes a 16 MHz clock. 
@@ -389,7 +404,7 @@ unsigned long pulseIn(int pin, int state)
 {
 	// cache the port and bit of the pin in order to speed up the
 	// pulse width measuring loop and achieve finer resolution.  calling
-	// digitalWrite() instead yields much coarser resolution.
+	// digitalRead() instead yields much coarser resolution.
 	int r = port_to_input[digitalPinToPort(pin)];
 	int bit = digitalPinToBit(pin);
 	int mask = 1 << bit;
@@ -423,7 +438,12 @@ int main(void)
 	sei();
 	
 	// timer 0 is used for millis() and delay()
-	timer0Init();
+	//timer0Init();
+	timer0_overflow_count = 0;
+	// set timer 0 prescale factor to 8
+	sbi(TCCR0, CS01);
+	// enable timer 0 overflow interrupt
+	sbi(TIMSK, TOIE0);
 
 	// timers 1 & 2 are used for the hardware pwm
 	timer1Init();
diff --git a/targets/arduino/wiring.h b/targets/arduino/wiring.h
index e90cb9fd5..b9ad6d0c5 100755
--- a/targets/arduino/wiring.h
+++ b/targets/arduino/wiring.h
@@ -1,8 +1,8 @@
 /*
-  wiring.h - Wiring API Partial Implementation
-  Part of Arduino / Wiring Lite
+  wiring.h - Partial implementation of the Wiring API for the ATmega8.
+  Part of Arduino - http://www.arduino.cc/
 
-  Copyright (c) 2005 David A. Mellis
+  Copyright (c) 2005-2006 David A. Mellis
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
@@ -55,9 +55,6 @@ extern "C"{
 #define degrees(rad) ((rad)*RAD_TO_DEG)
 #define sq(x) ((x)*(x))
 
-#define NOT_A_PIN 0
-#define NOT_A_PORT -1
-
 typedef uint8_t boolean;
 typedef uint8_t byte;
 
@@ -82,7 +79,6 @@ void printBinary(unsigned long n);
 
 unsigned long millis(void);
 void delay(unsigned long);
-void delay_ms(unsigned short ms);
 void delayMicroseconds(unsigned int us);
 unsigned long pulseIn(int pin, int state);
 
@@ -90,6 +86,9 @@ void setup(void);
 void loop(void);
 
 // XXX: internal definitions, should be moved to another header file
+#define NOT_A_PIN 0
+#define NOT_A_PORT -1
+
 typedef struct {
 	int port;
 	int bit;
diff --git a/targets/libraries/Matrix/Matrix.cpp b/targets/libraries/Matrix/Matrix.cpp
index f312097ed..c86c4c9c4 100755
--- a/targets/libraries/Matrix/Matrix.cpp
+++ b/targets/libraries/Matrix/Matrix.cpp
@@ -129,7 +129,9 @@ void Matrix::setRegister(uint8_t reg, uint8_t data)
 void Matrix::syncRow(uint8_t row)
 {
   if (!_buffer) return;
-  if (row < 0 || row >= 8) return;
+  
+  // uint8_t's can't be negative, so don't test for negative row
+  if (row >= 8) return;
   digitalWrite(_pinLoad, HIGH); // begin
   for(uint8_t i = 0; i < _screens; ++i){
     putByte(8 - row);                // specify register
@@ -162,7 +164,9 @@ void Matrix::setBrightness(uint8_t value)
 void Matrix::buffer(uint8_t x, uint8_t y, uint8_t value)
 {
   if (!_buffer) return;
-  if (x < 0 || x >= _maximumX || y < 0 || y >= 8) return;
+  
+  // uint8_t's can't be negative, so don't test for negative x and y.
+  if (x >= _maximumX || y >= 8) return;
 
   uint8_t offset = x; // record x
   x %= 8;             // make x relative to a single matrix
diff --git a/targets/libraries/Sprite/Sprite.cpp b/targets/libraries/Sprite/Sprite.cpp
index a2468a7b1..605587610 100644
--- a/targets/libraries/Sprite/Sprite.cpp
+++ b/targets/libraries/Sprite/Sprite.cpp
@@ -75,7 +75,9 @@ uint8_t Sprite::height() const
 void Sprite::write(uint8_t x, uint8_t y, uint8_t value)
 {
   if (!_buffer) return;
-  if (x < 0 || x >= _width || y < 0 || y >= _height) return;
+  
+  // uint8_t's can't be negative, so don't test for negative x and y.
+  if (x >= _width || y >= _height) return;
   
   // we need to bitwise-or the value of the other pixels in the byte with
   // the new value, masked and shifted into the proper bits.
@@ -85,7 +87,9 @@ void Sprite::write(uint8_t x, uint8_t y, uint8_t value)
 uint8_t Sprite::read(uint8_t x, uint8_t y) const
 {
   if (!_buffer) return 0;
-  if (x < 0 || x >= _width || y < 0 || y >= _height) return 0;
+  
+  // uint8_t's can't be negative, so don't test for negative x and y.
+  if (x >= _width || y >= _height) return 0;
   
   return (_buffer[y] >> x) & 0x01;
-}
\ No newline at end of file
+}
diff --git a/targets/libraries/Sprite/Sprite.h b/targets/libraries/Sprite/Sprite.h
index 3cf2be417..bdcfdb82f 100644
--- a/targets/libraries/Sprite/Sprite.h
+++ b/targets/libraries/Sprite/Sprite.h
@@ -45,4 +45,4 @@ class Sprite
     uint8_t read(uint8_t x, uint8_t y) const;
 };
 
-#endif
\ No newline at end of file
+#endif
diff --git a/targets/libraries/Sprite/binary.h b/targets/libraries/Sprite/binary.h
index cbbf2fd30..af1498033 100644
--- a/targets/libraries/Sprite/binary.h
+++ b/targets/libraries/Sprite/binary.h
@@ -512,4 +512,4 @@
 #define B11111110 254
 #define B11111111 255
 
-#endif
\ No newline at end of file
+#endif
diff --git a/todo.txt b/todo.txt
index 2b233d47b..a566cc482 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1 +1 @@
-0004 arduino
+0005 arduino