MongoDB Development 1.5.4 Released

[Eliot Horowitz]

MongoDB development release 1.5.4 is ready for download and testing.
This is a development release and shouldn't be used in production
unless there is a specific reason to.
We are getting close to 1.6, which is scheduled for the end of July.

There are a lot of changes in this release, particularly to sharding,
so testers would be greatly appreciated.

Notable Changes:
- sharding migration improvements
- sharding performance improvements
- better btree cleaning on deletes
- geo $center and $box fixes
- $in performance enhancements
- support upsert in findAndModify

Downloads: http://www.mongodb.org/downloads
Change Log: http://jira.mongodb.org/browse/SERVER/fixforversion/10167

As always, please let us know of any issues,
-Eliot