A few items that might help:
#1: Are your speed controllers AND your joysticks calibrated?
#2: Are your joysticks set up with a deadzone?
#3: Are you SURE that you're sure that you're not in autonomous on startup?
#4: Has the code changed at all since the last time you ran the robot, and was the robot working OK at that time? (This is to eliminate the programming team's coding as the problem, BTW--still doesn't let 'em off the hook for their setup.

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A few other "standard" diagnostic questions: What are the lights doing (RSL, cRIO, power board, D-link)? What messages are cropping up on the driver's station? What mode is the D-link set to?
And, one more question: Does it do the exact same thing when you set it on blocks and power it on and enable it?
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Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons
"Rockets are tricky..."--Elon Musk
