http://bugs.winehq.org/show_bug.cgi?id=20694
--- Comment #11 from Lawrence E Toal let02do@earthlink.net 2009-11-15 10:49:14 --- (In reply to comment #10)
GIF, JPEG, and TIFF image writing support are missing from Wine's gdiplus, and adding them would be straightforward (but probably a few days' work). It'd be more interesting to know why the BMP/PNG files are written incorrectly.
Would another run of WINEDEBUG=+gdiplus.. with a built-in's output while trying to save BMP/PNG formats be of help?