CMS If you make changes in the templates for 4.0 change them in the vb3 style too
 

If you make changes in the templates for 4.0 change them in the vb3 style too. I've been making changes to the VB 4.0 style header / footer, etc. and everything seems to be working fine.

Then I decided to use the menu in the footer to change the style to Default Style (vB3 Style - Incompatible)
and if one of your site viewers does this, none of the changes you made in vb4 default style will be seen.

It might seem like common sense, but it can clearly become an oversight if not caught.