I have the same problem. None of the suggestion here or in any of the links worked for me. (Ubuntu 10.10 here)

I have 2 accounts on this laptop, my wife (user1) and me (user2). The network indicator works in her user1 profile, also bluetooth indicator is there and turns bluetooth off. However user2 the network manager is missing so I can not change wifis or turn off bluetooth. Also, When the laptop is turned on, one has to first log on as user1 for the wifi to start and then switch users, else wifi will be off...

This is a major problem and this thread shoud NOT be marked SOLVED as none of the suggestions solve the problem.

Thank you everybody for the effort thou!