AOLserver is under active, if slow development. There have been a handful of bugfixes since the last release, but they are only available by building the server from source. I am also hoping to get the recent patches packaged up into an actual 4.5.2 release in the near future.
As for bugs, if you have any reports, by all means submit them - there are people reading and answering submitted bug reports and feature requests on the sourceforge project and mailing lists, but not many have been submitted recently.
The naviserver project sees a bit more activity, but is still relatively quiet. That is the problem with stable software - it doesn't make much noise, good or bad.
