Another day another release. :-) I've just cut 4.2.0.CR3. This release contains a number of bug fixes and stability improvements, including ISPN-777 and a whole bunch of memcached server fixes thanks to Galder. In addition, Tristan's CassandraCacheStore now also supports Key2StringMappers just like the JdbcCacheStores, as per ISPN-809.
For a full list of changes, see the release notes. As always, download, try out and provide feedback!
Onwards to a final release...