From OriginLab Wiki
Origin 8 Release Notes
The current version of Origin is version 8 SR5 (Build number 987).
If you are running a previous service release, it is recommended that you obtain the latest free service release and updated help files using the 'Help|Check for Updates' menu item from Origin.
- Bugs Fixed
- Known Issues in SR5 release
- Known Issues in Previous Service Releases
- Feature Changes from 7.5 to 8.0
- Features added/changed in SR2 release
- Features added/changed in SR3 + SR4 releases
- Features added/changed in SR5 release
Some information that is specific to upgrade users can be found here