I am having trouble uploading bmp files to my gallery. I tried both Batch Add and 1 at a time. It keeps telling me that the bmp file is not a GD extension. I checked my database, bmp is listed as image/bmp. In config, I have ALL for images. I tried also to type in jpg,bmp,png insteat of ALL, but it just causes a mess with the code. I'm running ver 1.3.1.
bmp isn't a native GD format. GD works with JPG and PNG formats, and with GD v2.0.28 GIF format. Coppermine doesn't support GIF with GD yet, but once PHP comes bundled with GD v2.0.28 the support will be written back into Coppermine.
For more information about GD, go to http://www.boutell.com/gd/.