Thanks for your answers.
More information here: Windows 7 sp1 4GB mem Graphics card ATI Radeon x1200 series (all drivers and OS up to date) Laptop dell inspiron 1721 (kind of old by now but revitalized when I installed Windows 7)
I don't have this issue with any other program (as far I recall)
Karlis, just to add. I reboot my pc daily but I loaded with so many things. Maybe this happens when I have a lot of programs running; I'll check this.
Hope we can tie this error and fix it.
At least I am not the only one (In Mexico we say: mal de muchos consuelo de tontos. Google translate: many poor consolation of fools)
Regards