This occured on version 2.0.2 and now on the recent upgrade to 2.0.3
The page fully loads, however, intermittently, the core column fails to fully appear. Further experimentation has shown that this only occurs in Firefox, not IE. Using the WevDev extension -> display div order, causes the missing styling (bg colour etc) to appear (the textual content is always there). This appears to be a rendering bug with firefox.
Does anyone know if this is down to the wordpress engine, if its occurred before, and a method to fix it?