I faced this problem when a user being logged twice, at a server and at a client. Closing Firefox on the server solved the problem. Isn't it your case?
Denis > About once a week, a student approaches me and says that Firefox is > broken. When you try to run Firefox, a message comes up that says that > it's already running. Re-logging in does not help. The end-of-day > reboot does! This was a problem in Edubuntu thin client 6.10 and now > in 7.04. -- edubuntu-users mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
