FYI, there are more details by Scott Robinson in a thread on the ubuntu- devel-discuss ML ("[Bug 49221] How to solve it, and why I'm not fixing it.")
https://lists.ubuntu.com/archives/ubuntu-devel- discuss/2007-March/000422.html -- Unable to start applications after suspend/hibernation https://launchpad.net/bugs/49221 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs