Hi Matt,
You said "earlier" - how much earlier did you try the beta? Would you mind trying again with the latest? If you still have a beta installed, and it is version 15.0, you'll have to uninstall and reinstall the latest due to the version number changing - it is now 14.1. You can get the beta here
There was hanging problem with selection of text and space bar, I'm not sure if that applied to delete key as well. This was fixed in beta (at least with spacebar)
If the problem persists in latest beta, let us know, so we can figure out what's causing it and get it fixed.
Thanks.
-John