My office PC hanged again today, so I ran a memtest and got rid of the faulty DIMM. I then sat at my desk and watched in fascination, as my attempts to run Thunderbird (in KDE) resulted in the birdie chawing up the 4 GiB of RAM I had left, then devour the 4 GiB of swap space, and just sit there waiting for the OOM-killer without even drawing the main window.
Are you serious, Thunderbird? Are you serious?!