Questions and problems of new version (1.00.851)

[Erups]

Thank you, but that doesn't answer my question, which was if it was a known issue of v 851.
I have WinXP SP1 btw.
Any idea about the other problems i'm seeing?
In other threads i read that divx properties are greyed out when you're not playing divx files, but in my case they are always grayed out.
Anyway the most annoying thing is the hogging and stuttering of heavy files...