Hi abwillis,
I have no specific problems that I can point to. I have just found it somewhat odd that irq 11 is so extensively used. Then I read the tip here
http://en.ecomstation.ru/ecs-rus/?action=ecs20-known-issues , and have read it on news.ecomstation.com before, so I decided to give it a try. I don't know if anything is better, but nothing is worse either.
I guess there must be some reason do use different irq:s for different devices, although that is out of my knowledge.