In short: looks like the problem is gone, feel free to close the bug, I will reopen if I am able to reproduce it and provide more info.
I haven't answered because I was having trouble with valgrind, when I ran evolution inside valgrind, it was unable to retrieve new mail (asked me for the password all the time, even thought if I was running evo before or after without valgrind it didn't asked for it a single time), and it was not crashing, eventhough it was when I ran it out of valgrind. Now it looks like the problem is gone, or at least I am not able to reproduce it anymore (maybe my system was having such a hard time because I had two conflicting modules loaded for my soundcard). -- Evolution freezes whole system when left open for a long time https://launchpad.net/malone/bugs/34138 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
