Your plugin is very good, i am using on my very large forum. But the problem is i have about 120000 images in the imgcache folder. Because of too much images in a single folder it crashes the server harddisk to get the images and load.
Now the suggestion: It will be good if your script can automatically create new folders for everymonth like when we are in november 2009 then folder name have to be /imgcache/112009/, for december 2009 /imgcache/122009/ etc.
If you can modify the script like this, i am sure your plugin will be the best for ever.
Thank you.