I just installed a new Drupal theme from this site (they have a pretty good selection now). Every time I update a page or site setting, however, the screen goes blank (white). The changes are saved, but it's annoying to see the white screen of death (WSOD) every time I submit a page or change/ update something.
Even worse, with the backup & migrate module, when I try and download a file, I get a screen full of characters instead of the file.
The problem is definitely with the theme - when I switch back to the default Garland theme I don't get the blank screens.
Any ideas for obvious things I could be checking?