DMG weirdness, help sought.

So, something weird happened today.

I downloaded the new version of Adium, and when the DMG mounted the resultant window showing the Adium files was black, rather than the custom background that Adium uses. I tried a couple of more DMG's that I knew to have custom backgrounds, and again, the background was black.

I repaired permissions, but that didn't help.

Thoughts?

Edit, I have included a picture to show you what I mean

Problem Solved

Tried the good old "killall Finder" command from Terminal, now everything is back to normal