-When working with a previous version assembly my mating is extremly slow. Adding, changing or editing a mate I see extreme lag, sometimes up to 30 seconds of wait time.  This is not seen when creating a new 2011 assembly.

-My Dynamic Highlight keeps on turning off.  I'm not crashing out, I'll be working on an assembly and I'll notice I'm not highlighting anymore, so I go into the options and turn it back on.