This is a bugfix release.
In versions 3.23.42-.44 when creating a table on Windows, you have to use lowercase letters in the database name to be able to access the table. Fixed in 3.23.45.
InnoDB now flushes stdout and stderr every
10 seconds: If these are redirected to files, the file
contents can be better viewed with an editor.
Fixed an assertion failure in .44, in trx0trx.c, line 178 when
you drop a table which has the .frm file but does not exist
Fixed a bug in the insert buffer. The insert buffer tree could get into an inconsistent state, causing a crash, and also crashing the recovery. This bug could appear especially in large table imports or alterations.
Fixed a bug in recovery:
InnoDB could go
into an infinite loop constantly printing a warning message
that it cannot find free blocks from the buffer pool.
Fixed a bug: when you created a temporary table of the
InnoDB type, and then used ALTER TABLE to
it, the MySQL server could crash.
Prevented creation of MySQL system tables 'mysql.user',
'mysql.host', or 'mysql.db', in the
Fixed a bug which can cause an assertion failure in 3.23.44 in srv0srv.c, line 1728.