Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
When receiving a Vanilla 2 email comment notification, clicking on the link takes me to the page, but all CSS formatting is lost. Text and images flow in a single column on a white page. I also get this when clicking the 'Flagged content' link in the Admin Dashboard. Is this a known problem? (Can't find anything relative to it by searching here).