MyBB Community Forums

When I updated my forum to 1.6.4, it messed up the custom theme - instead of the theme being green, it's blue.

I know they said about the theme change, and I did try to use find updated theme, used diff report, then full edit, did nothing to it, then saved.

Then I get this:

A potential security issue was found in the template. Please review your changes or contact the MyBB Group for support.

What am I doing wrong? Do I need to contact both of my theme makers?

regarding the security issue , is it similar to this ; if so, see response by StefanT there ;
if it is different then provide more details / screen shot ...