Just noticed new firmware v3.6.7 (5th May 2014) out for the 2920 series available from the FTP site.

No new features, just some updates/corrections.

Anyone tried it yet?

NB: links to the 2920 series firmware on the main uk site still point to v3.6.4

With the 2920 model i still have the previous 3.6.6 (with *rst* file) and was working good under normal settings (no servers running here or switches and complicate settings) for a week i had it on did not notice any issues ... some time this week i will update the firmware with the *rst* file
If you current firmware works fine for you the rule is ... if working don't touch ... however if you going to update use the *rst* file to avoid conflicts with previous firmware and all settings manually back from the begin

I also have the 2830n with 3.6.7 running about 2-3 weeks and again for basic use no problems runs smooth