Hovering over large .png files (900MB 65k x 65k) causes directory opus to close/crash. 500MB .png files with lower resolution seem to be fine, so I'm not sure if it's a file size or resolution issue.
Directory Opus Light 12.17 Build 7198 x64
OS 10.0 (B:17763 P:2 T:1) SP 0.0
(Note that the image won't display -- its dimensions are too large for most bitmap APIs to handle, and most image file formats in fact -- but Opus will no longer crash on it.)