Server ops can go ahead and upgrade. Release notes are here:
Also,
here are the release notes for v0.6.11.
I never published the release notes for v0.6.11, even though the code was pushed to master because I never felt comfortable with the upgrade script process. Consequently, a lot of people that installed FC recently got undocumented features.
New installs have been getting 6.11 just fine, but the upgrade.sh script had to be run multiple times when coming from 6.10 or older. At this point it just is what it is.
So, if you are coming from server version 6.10 or older, please run the upgrade script about 3 times in a row (not kidding). The bash script itself gets replaced in the process which is always messy. Sorry about that. :-(
As always, post with any breakage and I'll help you out.
DJ