MongoDB 3.0.6-rc0 has been released as a release candidate for testing, addressing several issues including a seg fault on cloneCollection, secondary crashes after upgrade to 3.0.5, and MMap memory mapped file address allocation code limitations. This is not the final stable version, but rather a recommended upgrade path for users of 3.0. The next stable release, 3.0.6, will be released after testing of this release candidate. Users are encouraged to test and report any issues with this release candidate.