I have tried 4.2.0 and 4.1.0 and they both do the same on my Laptop...
I Finally installed 3.3.6 lastnight and the video works perfectly!
Still couldn't do anything though (only had twm installed with no access to KDE or fvwm or beyond) I will install one of those this evening =)
I think the trident driver is messed up in 4.x.x versions (even the updated driver)
Has anyone anywhere got XFree86 4.x.x to work on properly on there Thinkpad 760XL with the Trident Cyber 9385 Video Chipset?