http://bugs.winehq.org/show_bug.cgi?id=18978
--- Comment #11 from Vincent Povirk madewokherd@gmail.com 2010-03-17 11:28:11 --- kgrab reports that it can provide the image/bmp format, but in practice it doesn't seem able to do this. I've tried pasting into Wine, a simple test program I wrote, and the GIMP. None of them were able to get any data.
Wine shouldn't crash in this case, though. I guess our error handling is not very good when we're trying to convert one format to another.