As per the title if you hit apply then OK nice and fast and want to change the wallpaper on Mint 15 KDE the image will not appear and a black background is presented, the speed of wallpaper applying and 'ok' ing directly coresponds to whether the image is accepted or not. waiting 1-1.5 secs and it will work. thanks Reproducible: Always Steps to Reproduce: 1. select wallpaper image 2. Click Apply 3. Click OK (now i hear a dev asking, why hit apply then ok? why not just hit ok? of course in most instances you will hit apply when choosing a nice wallpaper to see if it looks good.. but it is probably rare to then click 'OK' fast. FYI selecting an image and clicking 'OK' on its own is fine and works as fast as you like. Just apply + ok fast doesnt. Obviously not tested this way, hope this helps Thanks Actual Results: black screen Expected Results: a nice wallpaper image :) worked with apply and ok at any speed.
The same happenes on Arch Linux with KDE 4.10.5
*** This bug has been marked as a duplicate of bug 300708 ***