[gerax]

Hi

The same happens to me; I researched the answerbase and I came up with the fact that it seems to be some kind of memory usage bug with PT; I'm on 6.9 though and the suggested fix is to just update to 6.9cs4 that (as stated) should fix that and a couple other bugs. I've already installed it, and so far it seems to work fine, I'll try to report back after several days of continuous use.
I have to say that the versions from 6.4 to 6.9 have been some of the most full of bugs that I have experienced so far...

Hope this helps

L.G.