Just posted version 5.4.4 for PERL into the licensed users area. This basically fixes a variety of bugs and adds a couple new things. One is the end user being able to choose if they want to see other user's signatures. The other is an option to turn off alot of the new post tracking.
For more on the changes you can check the CHANGELOG
5.4.4 for PHP is under way and I hope to have it ready for release soon.