Nokia sure seems to like doling out firmware updates in batches, following in the heels of the X6, the Nokia E52 also has received a new firmware in the form of v31.012. The update is currently only available via the Nokia Software Updater and is a release with a focus on bug fixes and performance enhancements.
Apart from this there are small updates to the Web, Email, Music Store and Maps applications. The E52 features user data preservation so you can update without having to loose data or settings.
Now that the E52′s been updated, expect a similar update for the E55 soon.