Mac Wallpaper help

Hey I turned on my macbook today and instead of the usual background I got a blue wallpaper that will not change.  This person seems to have the same problem I do, I have version 10.5.8 and no other account, but I cant seem to figure out how to shut down the applications or change the  account or whatever this person figured out. If anyone can help that would be great.

Hey I turned on my macbook today and instead of the usual background I got a blue wallpaper that will not change.  This person seems to have the same problem I do, I have version 10.5.8 and no other account, but I cant seem to figure out how to shut down the applications or change the  account or whatever this person figured out. If anyone can help that would be great.

Oh noes blue screen of death! 
 
Yeah, sorry, that's all I've got. I do envy you Mac owners though, I want one.

Figured it out, just had to log out, log back in? haha kinda dumb that the wallpaper just shut off, but hey it works now, I can't complain.

Try re-booting.