In reply to Patrick B.

This may be correct in some cases. We tried to maintain paint of the same class names, but as this was a complete rewrite some of the structure has changed and there for some who had custom styling beyond just styling form elements might need to make adjustments.

This is the type of reason why we added a one click roll back though. We can't anticipate everything that could go wrong so we made a way to easy revert until you had time to take care of any issues.