Hey.

I am looking to use Python-thumbnails as a partial replacement for a thumbnail system that I was working on... But I've noticed an issue...

tnail = get_thumbnail(testfilename, '300x300', crop='center', force=True, format="PNG")

Does set the result file format to PNG, but the file extensions in the cache folder, is JPG.

tnail.extension
'jpg'

Is this intended? I'm using this in the basic python mode, without Django, etc.