Beta 10 is out now with the following:
Hopeful fix for videos in game startup themes not stopping audio when games start
Fixed an issue with horizontal wheels that I introduced in beta 9 (they were not scrolling properly)
Added a download acceleration-type-system for updates and theme downloads in the themes manager; got tired of crappy connections (*cough* Comcast) causing issues
Per the download accelerator stuff, it might seriously help update speeds, but you won't notice until the *next* update, and currently it's not yet implemented for background downloads. However, you can test the new system by downloading themes in Big Box, as those downloads all use the new download acceleration. Basically, what it does is divide up the downloads into a million different chunks, and instead of downloading the file all in one go, it downloads bits and pieces and retries up to 100 times if any of the pieces fail. It also threads the downloads so that multiple parts of the file are being downloaded at the same time. Hopefully it all works.