I just installed 3.5.7, and now I'm having trouble with the copy command (both CTRL+C and Edit->Copy). The error I'm getting is "There was an error copying the image to the clipboard". This was working in the previous version I had installed (3.5.6). I think it might be related to the number of pixels selected. 2520x2848 produces this error, whereas 2377x2395 doesn't produce the error. I'm running Win XP Pro 32-bit with 4gigs of ram on a quadcore processor (Q6600), so I should hope it's not running out of memory.