Based on MySQL 5.5.39, including all the bug fixes in it, Percona Server 5.5.39-36.0 is now the current stable release in the 5.5 series. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.5.39-36.0 milestone at Launchpad.
INNODB_CHANGED_PAGESwith a range condition
START_LSN > x AND END_LSN < ywould lead to a server crash if the range was empty with x greater than y. Bug fixed #1202252 (Jan Lindström and Sergei Petrunia).
With XtraDB changed page tracking feature enabled, queries from the
INNODB_CHANGED_PAGEScould read the bitmap data whose write was in still progress. This would cause the query to fail with an
ER_CANT_FIND_SYSTEM_RECand a warning printed to the server error log. The workaround is to add an appropriate
END_LSN-limiting condition to the query. Bug fixed #1346122.
The audit log plugin would write log with XML syntax errors when
NEWformats were used. Bug fixed #1320879.
If the bitmap directory has a bitmap file sequence with a start LSN of one file less than a start LSN of the previous file, a debug build would assert when queries were run on
INNODB_CHANGED_PAGEStable. Bug fixed #1342494.
Server would crash on login attempt if
mysql.usertable was truncated. Bug fixed #1322218.
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