I've just uploaded Mailman 2.1.5 release candidate 2 (no, you never saw rc1 :). Since there are some fairly significant changes with this version, I felt it was necessary to put out a release candidate to hopefully prompt some additional testing.

If you're able to test the new version, that would be great, but please note that:

  * The file format for on-disk messages in the qrunners has
    changed.  Until now, each queued message was represented by two
    files, a .msg and a .pck file.  With this version, all
    information is kept in the .pck file.  This improves stability
    and performance.  The upgrade script will attempt to convert all
    your existing .msg/.pck files to the single .pck file, but there
    may still be lurking problems with this conversion.
  * The pending database has been changed from a global pickle file
    living in $prefix/data, to a unique pickle file per mailing
    list.  The upgrade script attempts to determine which list each
    pending request belongs to, but it isn't always possible to
    know, so while it does the best it can, there may still be
    lurking problems with this conversion.

If you upgrade you should do so only on a quiet system. I recommend shutting down Mailman, your MTA, and your web server before doing the upgrade. Please note any problems you have with the conversion scripts (you may want to make backups first ;).

My thanks for not letting the above discourage you from testing the new version. :) I think the improvements in 2.1.5 are worth it, and based on experiences running python.org, the new version should be quite stable once installed.

I plan to release 2.1.5 final sometime next weekend. -Barry