Q4M 0.9 is now available from q4m.31tools.com, along with prebuilt binaries for MySQL 5.1.42 (running on linux and Mac OS X 10.5). The release fixes a deadlock issue under high load. Thank you to the users for sending the necessary information to resolve the issue. If you still find any deadlocks or stability problems of Q4M, please send stacktraces of all threads (by attaching gdb to mysqld and