Recently I've started having difficulty with Quicktime. AT first I thought it was just here at work because of the site filters I'm now under, but the same issue has arisen at home as well. I get the usual Quicktime screen as if it's going to load what I want to see, but then it just becomes a faded blue Q with a question mark over it.

I tried reinstalling quicktime. I also did some poking over at the Apple website and tried a few of their suggestions, but the problem persists.

Any ideas?