Today, we released rsyslog 5.4.0, a new v5-stable branch. This version begins a new stable series based on the 5.3.x series, which has been proven rather well in practice. Most importantly, the previous 5.2.x stable series had some serious issues. The new 5.4.0 contains fixes for all known problems. The main new feature is speed: several optimizations were done, including support for epoll in tcp listeners.
Users of 5.2.x versions are strongly encouraged to upgrade to 5.4.0.
As always, feedback is appreciated.