Odd window redraw problem...

Question

This just starting happening so I'm wondering if anyone else is experiencing this.
In Dreamweaver CS5, I normally work on a few pages at a time, all in tabs and I use split screen to see the code and design. Now, if I'm on one tab and then click on another tab to switch to that page, it does switch, but the window goes grey until I click a second time on the tab, then the window refreshes and I can see the content.
I'm attaching an image of what it looks like when I say the screen is grey:
Then on the second click, my window redraws to this (I had to blur the content):
I can't seem to find a setting that would have done this and the only change I've made to the system is clear the font cache, but I can't imagine how that would affect it.
Any help would be great.

Answer 1

Have you tried starting in Safe Mode and see if the problem still occurs?
Restart holding the "shift" key.
(Expect it to take longer to start this way because it runs a directory check first.)
If this works look in System Preferences > Users & Groups > Login items and delete any third party login items (-), you can always add them back with the (+). Also look in /Library/Startup Items. Nothing is put in that folder by default, so anything in there is yours.