Comment 9 for bug 560859

I have the same problem with a box upgraded from Karmic. Gnome, I almost exclusively use Firefox, Thunderbird 3, gnome-terminal and pidgin. No process has apparent high memory consumption. RAM is hardly used, with 1.2G of 2G swapped. Gets gradually worse until one has to restart after a couple of days. High I/O wait. ureadahead is removed/purged but it hasn't become much better.

Memory/Swap is not reclaimed when I do a full logout/login cycle, so I don't think it's an application with a memory leak.