We were adding a kid mode functionality to last years robot for demo purposes and loaded java code to the cRio after doing the 2015 update. This killed our serial to CAN bus. It also killed the serial port for doing console messages. If you are interested you can see the thread documenting this here:
http://www.chiefdelphi.com/forums/showthread.php?t=133381
Just wanted to warn teams if they are using CAN on their old bot and they need to make programming changes.