Crashes on Hyperthreading / Multicore and 100% CPU usage

[Prometheus]

It seems that RO runs more unstable on systems with more than one logical CPU (if you have Hyperthreading, a Multi-Core CPU or multiple CPUs). I know that from at least 4 different people.

Restricting RO to one logical CPU seems to help a lot in this case. Any ideas?

Also the in-game CPU monitor (when you press ALT + I) shows always >90% even if run on multiple CPUs. It seems that RO is running some tight loop on one thread and only does monitor this thread. Maybe this is related to the problem described above?

Even more weird, if I onfocus RO in windowed mode (e.g. I switch to the task manager), it stops consuming 100% power of the one logical CPU and my laptop fan slows down at the same time.

Why does RO use a whole CPU when focused??? Is it a input related problem?

Let aside power consumption, doesn't it also slow down the whole game?

P.S: You might also have noticed this thread in the German community:

http://regnum-forum.gamigo.de/showthread.php?t=1365

Edit: My system is a Toshiba Tecra A9 with a 2,2 GHZ Intel Core 2 Duo CPU.