I have been running Kubuntu 10.10 on my Macbook Pro with the Fluxbox window manager and all was fine until a few days ago I tried to use an external monitor by plaugging it into the Thunderbolt port and trying to configure it through System Settings.

However it did not work and somehow broke how Fluxbox starts up. When I log in I now get the error:

Edit: The image file does exist on the file system and I do have permission read it.

Also transparent backgrounds are not working so it seems some setting has reverted back to an old school method. Can anyone point me in the right direction in finding out what I can check for?

Thanks.

Solved. I just discovered these issues could be resolved by removing ~/.fluxbox/lastwallpaper