My IMAP email accounts have not been the same since the update. Emails are no longer instant and I needed to setup a sync interval to have them come in. Not sure if it was the update.
Battery seems pretty stable though... here's a graph from today... phone was off the charger at 6:30am.... by 6:30pm had about 50% left. I was not too active on the phone though... but was off wifi all day at work.