Thunderbird unresponsive after a few minutes

[Kees]

Using Kubuntu Jaunty 64 bit on a AMD64 system with 2 Gb of memory.

~$ lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04

~$ apt-cache policy thunderbird
thunderbird:
  Installed: 2.0.0.21+nobinonly-0ubuntu1.9.04.1
  Candidate: 2.0.0.21+nobinonly-0ubuntu1.9.04.1
  Version table:
 *** 2.0.0.21+nobinonly-0ubuntu1.9.04.1 0
        500 http://uk.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

When I leave Thunderbird running for more than about 5 minutes it becomes very unresponsive. It can take almost a minute before it responds to anything happens (after typing text or clicking a button). When I click the close window button in the top right corner (X) I will get a warning that thunderbird is no longer responding, when clicking 'Keep running' it will eventually close down. The fact thunderbird is slow does not affect other programs, they just keep responding as normal.
When I start thunderbird back up after closing it down it will respond normally again for a few minutes and then it starts over again.

[gf (gf-interlinks-deactivatedaccount)]

Hi Kees,
Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running only once:
apport-collect 376332

and any other logs that are relevant for this particular issue.

[Launchpad Janitor (janitor)]

[Expired for thunderbird (Ubuntu) because there has been no activity for 60 days.]