When using xfdesktop's window list function, sometimes it will fail to load an image named ''. After checking into it, I realized that although the code checks to see that it is a valid window list (by seeing the comment at the top), it still counts that line in the text file as a valid choice for a random image. I'll leave it up to the developer what the smartest choice of action would be, but it seems like the simplest way would be to never choose the zero index returned from get_list_from_file (common/backdrop.c), and the other approach would be to strip that entry inside of the function before returning. If this is fixed in 4.1.90 already, I'll shut up now. :-)
actually, it's most likely trying to read a blank line at the bottom of the file. at any rate, this works fine in 4.1.90. i'm not really interested in 4.0.x bugs, unless they're accompanied by a patch.