Deleting and recreating websites works fine, i'am doing it regularily in ispconfig. I understand that you dont know much about ispconfig and are not able to understand what happened in detail on your server, but then you might want to ask for help instead of claiming the nonse above.
If you would have asked us and checked the slave in debug mode, your problem would had been solved easily and without reinstallation.
Regarding the link that you posted to the mysql question, thats no bug in mysql, the poster messed in the user database of mysql manually and removed records without using he correct user drop commands nor doing a flush priveliges which is required after a change in that table.
Last edited by till; 13th October 2012 at 20:33.