DuraSpace has released DSpace 1.6.1.
Here's an excerpt from the announcement:
DSpace 1.6.1 is primarily a bug-fix release, which means it does not introduce any new features but improves existing features and fixes bugs discovered in earlier versions of DSpace. This is also the first [minor] version of DSpace to use a “time-driven” approach to release, rather than a “feature-driven” approach: we set a deadline and worked towards releasing on that date, instead of releasing when a certain number of issues were resolved. DSpace 1.7 will be the first major time-driven release.