Pixelated Icons... no clue why they happen.

Hello

I've had this happening to me on and off for a while now, maybe once or twice a week. Randomly, one icon on my desktop will become pixelated. I find it really odd because I've never heard of this or seen this happen to anyone before and when I look it up I find nothing on the subject. Anyway, here's a cropped screenshot of some of the icons on my desktop; in this case, Firefox is pixelated.

http://i225.photobucket.com/albums [...] on_pic.gif

Ok, now that you've seen that, anyone know what it could be? My first guess was that it was my video card (somehow, I'm mainly a geek, not an expert heh)... but that was disproved when I got my 8800GTS a couple months ago.

Oh, if you're wondering, I can temporarily fix the problem. All I have to do is right click the icon > Properties > and change the icon from the default pic to another, then change it back. Kinda weird if you ask me, but it works until another icon goes like that. And it's not always the same icons either; I've had it happen to IE, Firefox, iTunes, etc etc.

It's not really a big deal, just a bit annoying ^^

So anyone know?

Yup. Sure is
And? Heh, still stumped here

Mine actually vanish completely (well they are still there but completely invisible) Just a space for the odd icon. If I double click where the Icon is supposed to be it still opens the shortcut as normal. Happens to me often when PC runs low on processor and RAM. I also have to edit properties and change to another pic and back to make it reappear. Even a reboot doesnt fix it.

Atleast you can still see where yours are.