Applications icons vanishing

I noticed the strangest problem recently, well not so much problem. nothing stopped working. I didn't need to call anyone for assistance. It was a glitch that lead to some of my icons in the Applications folder disappearing.



Programs effected if in my dock their icons were still OK. All programs still launched fine, it was just annoyinhttp://www.blogger.com/img/gl.link.gifg to notice this weird behavior in the applications folder.

The only thing I can think of that I did before I noticed it was run this tip from macosxhints.com. My open with menu had some duplicates in there and they were also not causing any problems other than being annoying. I have not idea if this effected my icons at all but like I said the only thing I remember doing that was slightly classed as tinkering.

/System/Library/Frameworks/ApplicationServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user