Mysql upstream found a bug in the way the mysql server handles database
permissions when the server is run on a case sensitive filesystem.
This could allow a user who has been granted certain rights to do unexpected
things, such as creating a new database.
The upstream bug has more information:
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.