Main menu and various other things (randomly?) stop functioning? (Lot's of WTFs here)

[Cannotcompute]

After my nightmares with my last installation of Ubuntu, I got out a new hard drive and did a totally fresh install. I thought I had finally done away with all of the mysterious problems I had been having. I was wrong. One horribly irritating problem still exists.

Seemingly randomly, the main menu will randomly stop working, by which I mean when I move my mouse over one of the tabs, it will turn blue as if it has been clicked, but nothing else will happen. When I do click it, nothing happens. Also, whenever this happens, all of the menu toolbars in applications will do the same thing. This means that if I have unsaved documents I cannot save them either.

If this wasn't enough, a THIRD thing dies when the menu bar starts acting up. All wifi devices stop working, and the Ubuntu menu claims that there is "No internet connection."

Any Ubuntu gurus out there?

EDIT: Forgot my specs
Dell Latitude D600
Ubuntu Intrepid
768MB of RAM (tested, no errors)

[Rallg]

About a week ago, I complained that I was seeing weird things on my mini 9 with 8.10. I have used ubuntu for awhile, and my concern was that maybe my hardware was going bye-bye. In my case, random file permissions were changed, or Trash stopped working, or some other weird thing - always accompanied by a WiFi problem.

I concluded that one or two particular WiFi sites were the problem (I could be wrong). All I know is that when I was connected there, the problems happened. When I was connected elsewhere, no problem. Nobody else was having problems (Windows or Mac) at those places; just me. Memory check OK, no viruses.

If I am right about the WiFi, it suggests that a bad signal is being received, and instead of rejecting it as noise, my receiver is passing garbage into the system, where it causes havoc.

I don't know for sure. Since there are no logs for it, I cannot file a bug report.

So, my suggestion to you: Try a completely different WiFi location, if you can. Same problem, or not?