#0 - Nov. 18, 2010, 10:04 a.m.
Blizzard Post
During patch days, everyone wants to get updates as soon as possible, and our Technical Support team is here to help you with a special FAQ (http://eu.blizzard.com/support/article.xml?articleId=20110) designed to address any issues which might arise while patching. Please note, however, that for patch 4.0.3, not all of the features in the patch will be available immediately.

You can also access the full support site (http://eu.blizzard.com/support/index.xml?gameId=11&locale=en) which includes general assistance on in-game topics and new content.