This is such a newbie question that I'm embarressed to ask, but I never get this right - I wish to change the background-image in the altskin.css but when I do the change is not reflected in the cached file!
I call cleanup.php and force cache regeneration but the cached file is not updated.
How do I get my background-image edit picked up?
What confuses me is that when I change other elements in the altskin.css I don't need to do anything to get the changes copied to cache!!