There are new updates for Microsoft AntiSpyware beta 1 Refresh Update Build 614 today. To ensure you have the latest definitions, click Help > About Microsoft AntiSpyware > under "Microsoft AntiSpyware system information:
Spyware Definition Version: 5729 (6/25/2005)
You can acquire the updates by ensuring you have AutoUpdater turned on (Options > Settings) or File > Check for Updates (Manual)
Please note there are some issues obtaining this update, if you are experiencing problems, please re-download the 614 build of Microsoft AntiSpyware and do a manual update again from the file menu.
Download Microsoft AntiSpyware Refresh Update build 1.0.614 HERE