Curious, I was loading different pages on your site and didn’t see the change…
If not the theme then it must be a plugin you are using, Looking at the scripts there a lot there I am unfamiliar with.
Well – we can turn off the forum tooltips which should stop the conflict. This is not the right way to do it but it is good enough for testing.
Go to the forum admin > themes > theme editor. When it loads look down the right hand side for the file ‘spFunctions.php’ and click on it to open it in the editing box.
At the top you will see the line pf code:
if (!defined('SP_TOOLTIPS')) define('SP_TOOLTIPS', true);
Change that word true at the end to false, save it and see what happens.