I recently tried this plugin with a fresh install of WP 3.5 and the following problem occurred:
Certain directories dont show any files. Infact nothing loads, only the page around it.
I switched on debug mode to find out what was going on and found that while the script was running over the files it just stops. I cannot see a clear reason for it doing so. I checked filenames for special charaters, file extensions and file sizes, but none of these seem to be the cause.
I later found out that the image preview for the icons was causing the problems. Smaller JPGs load fine, however the tendancy showed that larger images approx. > 1.5MB freezes the script!
Otherwise its a very nice plugin! Just needs a bit more support I think