Indeed, you can't just delete the user. When you do this, just make sure
you kill nm-applet (killall nm-applet) before starting it in your user
account.
That's fixed in Oneiric and Precise.
** Changed in: network-manager (Ubuntu)
Status: New = Fix Released
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You received this bug
** Description changed:
+ Maybe related to Bug 955236
+
Make 2nd User and
Log out 1st user
Log in New 2nd user
Connect to Wifi
Switch to 1st user
Switch to 2nd user
Log out of 2nd user
Log in 1st user
NO Wifi applet showing
Delete 2nd user
WIFI NOT ACCESSIBLE without
