I just upgraded my 8310 from 4.2.0.x to 188.8.131.52 and I'm quite happy with it.
Being with Rogers (Canada) and not seeing any attempts at releasing past 4.2, I searched for a MultiLang 4.5 to use on my 8310.
So far, i've seen immediate benefits:
v184.108.40.206 (Platform 220.127.116.11)
- HTML email support
- MVS (Mobile Voice System) support
- Cleaner look to Address Book
- Cleaner look to viewing email, nicely separated headers.
- Video Camera is really a great add-on. Small sound-sync issue.
I had Facebook Mobile installed before the upgrade, and I no longer have the icon for it. Its still in my service books, I will attempt a service book deletion and reinstall to see if it comes back.
Also, BlackBerry Maps works the same as with 4.2, I installed Google Maps (and the Google Mobile Updater) and it fails to load. Picasa, Documents, Sync, GTalk, etc all work well.
I'm very happy with the upgrade, and being a BES admin, I can test out policies, software pushes, etc. We have a few new 9000s coming in soon, and I'll be comparing them to my current 8310 4.5 OS.
Is there anything else (BETA) that is newer than the .55 rev I have? I'm not asking for links here.