i encounter a huge problem with 2.62.3 rendering (cycles with GTX 470 CUDA version- Win7 64bits - WHQL296.10 ). I've tried differnet version of 2.62 ( 45470, 45628... but not the originalm 262 version ).
On some scenes, when rendering, it displays a buggy screen ( mutli color/lines etc... ). It happens particulary with the scene attached to this message.
I 've tried with 2 workstations ( the other one with GTX 470 too - Win7 64bits - WHQL290 ) and same issue.
The same scene renders correctly with 2.61 version.
On the first machine ( which has a GTX 285 too ), it renders correctly when choosing the GTX285 (CUDA version).
Does these version contain the kepler patch ?..
precision: il you delete the light of the scene and replace the wall material by an emission material or another lightning system , it renders correctly with fermi card...
so this light seems to be the source of the bug !