Comment 34 for bug 539300

My router had wireless settings for the B+G+N Network at 2.4 Ghz. The speed varied from 2 to 54 mbps.
My broadcom adapter is expected to be N capable.
Changed the router settings to G only at 2.4. Ghz

The network manager applet is working as it should be with the G only setting.
The icon without an exclamation sign doesn't disappear when I logout en login to the same of an other user
The network is mentioned under wireless networks
The speed looks stable at 54 mbps

So: al problems disappeared when i changed the routersetting to G only

I also tried N only; It worked but all aboved mentioned problems remained the same. So the problems might be related to wireless N Networking