front end - Mathematica 10 'Formatting Notebook Contents'

Mathematica 10 freezes while 'Formatting notebook contents'. This happens already during the startup of Mathematica and it takes a long time for Mathematica to recover. It can also happen when I am editing a Notebook or browsing the documentation. Especially the documentation is very slow.

Is this somehow related to the Mathematica FrontEnd? Is anybody else struggling with problems like this?

EDIT: I'm using 64 bit Windows 7

Answer

Issue resolved with the recent update to Mathematica 10.0.1. The startup of Mathematica still takes quite a long time, but afterwards the notebook won't freeze anymore. 'Formatting notebook contents' only occurs on startup MMA and on closing a notebook.