Here is a second beta test for Teensyduino 1.39.

Old beta download links removed. Please use the latest version:

Changes since Teensyduino 1.39-beta1

Stream find functions now take const pointers on Teensy 2.0
Update Print class for Teensy 2.0
Don't redefined BYTE (for ancient Arduino compatibility) if already defined
Support AVR pgm_read_ptr() on Teensy LC & 3.x
Fix srandom conflict
Raspberry Pi builds with 2017-07-05-jessie (previous builds were on 2014-12-24-wheezy)
Updated libs: Adafruit_NeoPixel, Snooze, TFT_ILI9163C
Fix compiler warnings & improved error messages: EEPROM, Adafruit_CC3000, Adafruit_GFX, Adafruit_ILI9340, Adafruit_ILI9341, Adafruit_RA8875, ADC, FastCRC, FrequencyTimer2, i2c_t3, ILI9341_t3, IRremote, Keypad, ks0108, OctoWS2811, OneWire, openGLCD, OSC, RA8875, SerialFlash, SoftPWM, ssd1351, ST7565, Talkie, Time, TimerOne, TinyGPS, Tlc5940, x10