I noticed a lot of people are having issues with the browser crashing a lot more in the updated binary. I must be one of the lucky few that missed that problem as I haven't had the browser crash yet (knocks on wood).

As for flashing back to previous binaries, it shouldn't be a problem. I've done it before. I don't see why it wouldn't work from this version as well.

I guess it's worth upgrading if you need better Bluetooth support, slightly faster web browsing, or just have to have the latest version of software for the 770. Other than those improvements, I've seen no significant reason to upgrade to this version.