This is the proper fix for the session problem. Since its not a major change its not going to be a full release and sessions still work fine with the 3.0.1 HotFix/3.0 Release.
But if you want to get the update for it now you can just overwrite your files with the ones contained in 3.0.2_Dev.zip
Changelog
- Proper fix for check invalid session key
- Commented all new code from 3.0
Install Guide
Overwrite your files with the ones contained in the v3.0.2_dev.zip.