Am trialing your latest version. OS is WinXP SP2. Camera is Canon 20D.
Am having problems displaying thumbnails at the various sizes:
Slider stops 1,2,3,4 are OK.
Slider stops 5,6,7,8,9,10 the thumbnails are black.
Slider stops 11,12,13,14,15 are OK.
The thumbnail in the IPTC edit window is also black.
This is the case with JPEGs and RAW, however the only difference is with RAW is the slider 5 thumbnail size works and the IPTC edit thumbnail works.
A strange one.