I've just reported bug #505224 as a duplicate of this. It contains some syslog info which may help understanding the cause of this problem.
To cap it all, my laptop dropped off the network trying to file this comment..... Trevor -- [Karmic] wireless connection keeps dropping - WPA TKIP https://bugs.launchpad.net/bugs/481432 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
