Are you making jokes here?

MySQL database server & standard clients:

* MySQL 4.0 -- Production release (recommended)
* MySQL 4.1 -- Alpha release (use this for new development)
* MySQL 5.0 -- Development tree (use this for previewing and testing new features)
First: here you may see, that the recommended production release is 4.0, and 5.0 is for testing new features.
Source http://dev.mysql.com/downloads/
Note the dot-com in the name.

Have a look at this page, before telling there is no bug:
http://bugs.mysql.com/bugstats.php

Of course, every complex software has bugs, and there is nothing wrong with that.
But it's wrong to tell it has no known bug.

Perhaps it had no known bug when released, but of course bugs are found when used by many people on different systems with different ...

MySql is a fine, usable, and quite stable amateur database, used by millions of webhackers.

And postgres is a seldom used, professional database. Stable and usable, as well.

Are you somehow involved in mySql?