A change log has been posted on The Symbian Blog. Notable new features include Maps 2.0, full version of N-Gage, Nokia Search 4.0 with Google plugin and Share on Ovi. Many of these features were already also available as separate downloads previously. There’s also a bunch of other improvements.
For some reason this time around, although the software upgrade itself worked perfectly, the restore from backup created some problems. For example, there were quirks like my Access Points all being defined twice (with identical names). It happened before, but while previously a reset and re-restore worked fine, it didn’t work this time. So for the first time, I decided to give up on restoring from backup. Most of my “precious” information is already sync’ed to my notebook, so it is not a problem to get back my contacts and calendar information. (It’s probably a good idea to not restore all the cruft built up from several months of use back into the phone anyway…)