I am having a bear of a time trying to close Photoshop at times. This problem happens both on my home computer and my office computer.
It affects tool selection, and document tab selection.
I will be working on a document and will occasionally tab over to another open program. When I return to Photoshop I can't select tools or the document. I can't even minimize the program. I will even try to close the program and the "Quit Photoshop" line is grayed out.
I use a spring 2009 Mac Pro with 16GB ram running a Nvidia Quadro 4000. I am running OSX 10.8.3. At the office I am running a 2010 iMac standard configuration with 8GB ram, running OSX 10.7.
I have even deleted plist files and the problem remains. This bug started when I was on CS5.5.
I really hate force closing the program. I am on Creative Cloud and this is the only program that behaves this way.