Programs cannot be uninstalled in Vista

Corson writes: "I am surprised nobody seems to have reported this on /. yet. Possibly after one of the latest updates in Windows Vista, two strange things happened: first, the Uninstall option is no longer available in the Control Panel when you right-click on older programs (most likely, those installed prior to the update in question, because uninstall works fine for recently installed programs; the Uninstall button is also missing on the toolbar at the top); second, some programs are no longer shown on the applications list in Control panel (e.g., Yahoo Messenger). A Google search returns quite a few hits on this issue (e.g., here, here, here, and here) but everybody seems to be waiting patiently for a sign from Microsoft. But M$ seem to have no clue or they would have fixed it already. I am just curious how many of you are experiencing this nuisance."