[B3.1] Editors screenshot render engine problem

[xrayjay]

If i would like to render a screenshot in the extended editor and i select in the window which appears after clicking at the "bmp" icon "compute raycast shadows" the picture ends up in weird colors (see screenshot here), without raycast shadows selected all looks good (tested with several models, all the same).
In the last versions this error does not appear, just saw it in the beta 3.1


Sysspecs:
i7 950
16gb ram
geforce gtx 570 with driver 314.07 (newest whql)
win7 64bit