MongoDB 2.6.11-rc0 has been released as a testing release candidate containing only fixes since the previous version 2.6.10, and is expected to be followed by the next stable release 2.6.11. This release addresses several issues including problems with compound indexes, extent manager assertions, plan ranking tie breakers, log messages, and permissions for the "restore" role. The MongoDB team invites users to test this release and report any issues they encounter.