Try unplugging the wheel and plugging it back in (both the wall outlet power and the PS3 plug). Reboot everything. My Driving Force GT is working.
On that topic. I don't know how I feel about these new Force Feedback Settings. Right now, I do NOT like the way my DFGT feels anymore. I'll have to play with the settings. I've got them at the default. 5 and 8. I don't think I should have to turn the torque up any further. I used to always keep my FFB setting on 5.
Now, my wheel makes all sorts of strange noises even when I'm driving straight. Please do not break my wheel GT6. I will be furious...