Comment 4 for bug 133139

This seems to be still an issue in jaunty.
I scrolled down the update list using the down key, and when it got to the bottom, the update panel was displaying change logs for every package.
Also it gets stuck on kernel packages for a second, but causes 100% cpu on one core. (most likely because of the size of the kernel changelogs)
This issue doesn't care if the description panel is hidden either.

I would recommend not loading the changelog, or description unless the description panel is displayed.