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This is an General Availability release. We did our best to eliminate bugs and problems during the testing release, but this is a software, so bugs are expected. If you encounter them, please report them to our bug tracking system.
DML operations on temporary tables would try to append the key for provider library, which could cause a memory leak. Bug fixed for MyISAM temporary tables, InnoDB temporary tables still have this issue, probably caused by upstream bug #67259. Bug fixed #1112514 (Seppo Jaakola).
Based on Percona Server 5.5.29-29.4 including all the bug fixes in it, Percona XtraDB Cluster 5.5.29-23.7.2 is now the current stable release. All of Percona‘s software is open-source and free.