Description of problem:
If the /var/lib/mysql directory contain more than 31999 files/directories/databases that new database creation is not possible.
This is not possible even for root.

Version-Release number of selected component (if applicable):

mysql-5.0.51a-1.fc9.i386
mysql-devel-5.0.51a-1.fc9.i386
mysqlclient10-3.23.58-9.2.1.i386
mysql-libs-5.0.51a-1.fc9.i386
mysql-server-5.0.51a-1.fc9.i386
mod_auth_mysql-3.0.0-6.i386

How reproducible:
Always.

Steps to Reproduce:
1. have more than 31999 databases
2. try to create new database 
  
Actual results:
The mysql server crashes

Expected results:
The database is created

Additional info:
This is important for web hotels, ISP etc.
fedora.polarhome.com has more than 70k accounts and more than 50k mysql databases created (usually one user one database)
Unfortunately, it is needed to be removed not used databases (subdirectories) under /var/lib/mysql in order to create new databases.

When the number of entries in /var/lib/mysql fall below 31999, the new database creation is possible.