I hate to be a pain but in the long run it will be worth it...
• Remove the previous version of the Tiny Core (arduino-tiny-0100-0013.zip).
• Install the latest version of the Tiny Core...
http://arduino-tiny.googlecode.com/files/arduino-tiny-0100-0014.zip
• Navigate to the libraries/JeeLib directory
• Locate and open Ports.h in a text editor
• Towards the top of the file make this change...
// keep the ATtiny85 on the "old" conventions until arduino-tiny gets fixed
#if ARDUINO >= 100 // && !defined(AVR_ATtiny84) && !defined(AVR_ATtiny85) && !defined(AVR_ATtiny44) && !defined(AVR_ATtiny45)
#define WRITE_RESULT size_t
#else
#define WRITE_RESULT void
#endif
• Save and close Ports.h
• If the Arduino IDE was running, close it and restart it
• Try again to compile the sketch