This seems to be some bug in Vista, it happened to me too.
I found a fix on some other forum, and it worked for me.
1. First you need to open the Windows "Run" dialog, which you can fin
either in the "Accessories" folder in the "Start" menu, or by pressin
"Windows Key + R"
2. Next type in "regedit" which will bring up the Registry Editor.
3. Now go to "Edit" and "Find..." (or Ctrl + F) and search fo
"iconstreams".
4. When the results come up, delete the keys "IconStreams" an
"PastIconStreams".
5. Restart the computer, and recheck the missing icons in the taskba
properties.
This works, but only temporarily it seems. My icons disappeared again
and I found the keys had come back, but getting rid of them fixed i
again
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tragicmuffi
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