Some people in Runes of Magic have been getting frequent crashes ever since the patch a few weeks ago. I would get crashes once in a while, usually when teleporting or leaving my house.
Runes of Magic just posted an explanation of the problem and said they are working on it.
I think it is great to see them communicating to the players in a pretty open and honest way about what is going on. Some players were raging about the crashes. Hopefully knowing that the development team has identified the problem and is working on the solution will help calm everybody down.