It may, any thing default style settings in it that are customized in the parent style will change to the inherited (not hard to fix though). It is a good practice to have add custom templates into a master style.
Maybe something like:
Default vBulletin style
->custom style 1
-> custom style 2
--> custom style 2a
and have all your custom templates in the top level one, and style modifications in the child styles.
|