Bug fix: database table names had been processed in the lowercase format and tables could not be deleted if have uppercase letters in it. It is fixed now. If database table has 'dbTableWithSomeData' name, you will see it as 'dbTableWithSomeData', not as 'dbtablewithsomedata'. Thanks to Deirdre who found this bug.
Technical update for WordPress 3.0 full compatibility. Staff deprecated since WordPress v.3.0 is excluded.