bryanp/jQuery-Equal-Heights — comment on commit 4f8ab8a787f710f10d54dd722399c3c8bd47e023
File:  line 0
By jlbruno:

This seems to fix the error I was getting as well. The demo shown here has an extra "pxToEm" function added to the Number prototype that is not included in the code in this repository:
http://filamentgroup.com/examples/equalHeights/

Original error:
currentTallest.pxToEm is not a function
/includes/js/jQuery.equalHeights.js
Line 26