Which is the best stable OS and BUNDLE for BOLD 9900?

Hey :) I want to know which is the best stable OS version and Bundle for bold 9900.
I want to upgrade/downgrade because my mobile automatically restarts :) and i think its in my OS. Although i'm using this OS since 5-6 months. And my battery is new just bought it 5 months :)

This seems to be the newest: http://forums.crackberry.com/blackbe...-o2-uk-865486/

Regarding stability, I recommend you read through the thread.

About the restart problem. It happens due to the battery. There is very less chance that an application or OS does this. I have bold 9900 and have changed the battery twice. This is my 3rd battery now and it costed me around 17.6 usd. BTW im using 2435 bundle (7.1.0.862).