Different resolution preview broken

[Ethatron]

..., ive been having a lot of crashes with DDSopt lately. For instance after constraining the _n.dds files from Serious HD to 50% resolution, when i click on Primary (Destination) in the preview tab it crashes. This happens with all the _n.dds files from Serious HD.

[z929669]

I can confirm that I had a similar issue with update 3, but not with update 4. Whenever I tried to use the preview tab to look at the destination of a normal map, it would crash. Only *_n.dds and only when attempting to switch to Primary (destination) on the Preview tab