Comment 2 for bug 228365

I confirm this bug and I think it's upstream. I don't use ubuntu, but it's the same in my distro (archlinux) and I've seen this bug on other trackers as well. People even think it might have something to do with the kernel... This only happens with one of 4 vpn servers I'm connecting to, so I guess it's also depending on the server configuration.

http://lists.opensuse.org/opensuse-bugs/2008-09/msg05167.html
https://bugzilla.novell.com/show_bug.cgi?id=411596