New Admin Menu Incorrectly Saves Data

I upgraded to beta2 and noticed that after saving the new form from the administration menu, my services stopped working. I took a look at the database and saw that the variables "charset_method", "charset_php", and "charset_sql" were actually being set to 0, 1, 2, etc. depending on the value selected in the menu, not to the correct string as they are referenced elsewhere. Attached is a patch that should resolve this by setting the keys and the values to the same thing for those three arrays.