We have today released v0.30.4 of TweetDeck which contains fixes for the following issues:

• Authorisation of Facebook accounts not working correctly
• "Invalid signature" error when sending accented and "special" characters to Facebook
• Facebook pages not accessible for some users under Settings > Accounts > Add Pages
• TweetDeck starts up totally empty
  

This version  can be downloaded manually by clicking Download Now at http://www.tweetdeck.com. An automatic upgrade is expected to be scheduled for all users early next week

If you have problems with any aspect of TweetDeck, please come back to TweetDeck Support to check out the Forums, or log an issue by clicking "Submit A Request"