Back to my original problem above: it still happens. Not always, but quite often. When i wrote that above, that updating the addons helped, it seemed like i just was lucky that it went fine for a few times.
As somebody pointed towards memory use: 64 bit system, so probably not the reason anyway, but the game goes to about 2 GB. So, i tooled around for some time again today, and it really seems like that. With all "regular" addons active, the game sometimes crashes when logging in a character.
Merely a pointer on where there could be useful log files on it would already be appreciated. Those log files i find don't seem to log the reason for the crash.
