Apache::Session 1.52 has been uploaded to CPAN. The main change in this version is the inclusion of modules to work with Sybase, contributed by Chris Winters, and a smattering of bugfixes.
There is a memory leak if you use a persistent database handle with Apache::Session. The memory leak is in DBI, and I haven't had a chance to fix it yet. You can minimize the impact of the leak by occassionally letting your Apache children die, or re-opening your database connections.
Get the new Apache::Session here: http://www.perl.com/CPAN/modules/by-authors/Jeffrey_Baker/