Clue needed?
Anonymous coward 2, Sun provides support for PostgreSQL as well so I guess Sun is happy either way. Want some free beer or some real GPL freedom? You can get the MySQL Enterprise builds and source from non-MySQL mirrors like http://mirror.provenscaling.com/mysql/enterprise/. Where can I get the proprietary EnterpriseDB builds and source without paying EnterpriseDB?
Anonymous Coward 1, you're trying to get them to say 5.1 is ready for production use while you're having a problem that proves it's not? Logic failure. Do they listen to what you're telling them about a bug that you say is critical and not release it or listen to you begging them to release it before it's ready so you can get a hot fix?
You wouldn't be writing about speed improvements if your business is non-operational. The support monkeys must be trying to be polite to a difficult customer who is trying to get something she's not entitled to.
"What limitations apply if I use non-Enterprise binaries or non-GA Enterprise binaries such as alpha, beta, and release-candidate (gamma) binaries?
Non-Enterprise platforms do not receive Hotfixes".
http://www.mysql.com/about/legal/supportpolicies/policies-04.html
"What issues are eligible for a MySQL Enterprise HotFix?
HotFixes are emergency database server patches. The issue must be validated by MySQL Support as a Severity 1 case. The bug must not be addressed in a current MySQL Enterprise server service pack".
http://www.mysql.com/about/legal/supportpolicies/policies-03.html
"Severity 1 Issues
A Severity 1 problem represents a catastrophic problem in the customer's production systems. The customer cannot continue essential operations".
http://www.mysql.com/about/legal/supportpolicies/policies-11.html