Not huge problems but consistently annoying.  I haven't gotten very far into the 1.1 patch yet, but I have noticed that there are problems with the Sovereign shield (arm clips through it, especially noticeable in Sovereign Creator) and Champions holding wooden staffs too near the top (looks strange).  And I don't know if this is a problem or not, but it seems that my video card fan runs full speed constantly while playing Elemental; it doesn't even do that with Starcraft 2.