Mozilla published a second release candidate for the next build of Thunderbird on Wednesday. Judging from the public bug list, only one critical bug kept Thunderbird 3.1 Release Candidate 2 from becoming the final build of the current branch, code-named Lanikai.
Available for Windows, Mac, and Linux, this second release candidate fixes one critical bug on Macs, one major bug on all platforms, and three ''normal'' priority bugs. The now-fixed Mac bug had caused the open-source e-mail client to crash, and then crash again on subsequent launchings. The cross-platform, major-level bug repaired a settings migration assistant problem where the tool didn't recognize advanced IMAP synchronization settings. The full bug list can be read here.
Thunderbird 3.1 will feature a new migration assistant and new setup wizard, saved files manager similar to Firefox's Download Manager, quick filter toolbar, and faster search results. Assuming no other critical bugs are discovered, the final release of Thunderbird 3.1 can be expected on schedule for sometime in the next week.