Changes 5.1.60:
* Upgrading from an Advanced GPL RPM package to an Advanced RPM package did not
  work. Now on Linux it is possible to use rpm -U to replace any installed MySQL
  product by any other of the same release family. It is not necessary to remove
  the old produce with rpm -e first.
* MEMORY table creation time is now available in the CREATE_TIME column of the
  INFORMATION_SCHEMA.TABLES table and the Create_time column of SHOW TABLE
  STATUS output.
Bugs Fixed
* Important Change: InnoDB Storage Engine: Data from BLOB columns could be lost  if the server crashed at a precise moment when other columns were being
  updated in an InnoDB table.
* InnoDB Storage Engine: This fix improves the performance of instrumentation
  code for InnoDB buffer pool operations.
* InnoDB Storage Engine: Lookups using secondary indexes could give incorrect
  matches under a specific set of conditions. The conditions involve an index
  defined on a column prefix, for a BLOB or other long column stored outside
  the index page, with a table using the Barracuda file format.
* InnoDB Storage Engine: This fix corrects cases where the MySQL server could
  hang or abort with a long semaphore wait message. (This is a different issue
  than when these symptoms occurred during a CHECK TABLE statement.)
* Replication: Issuing the following statements, in the order shown, could cause  a deadlock between the user thread and I/O thread.
* more...

(adam)