mootools/mootools-more — pull request #1220 by YonmaN (2014-01-20 14:30:07+00:00)
Title: Update Element.Measure.js

Replaced simplistic import of values with a check for ie11 behavior and handling for "px" suffix for css size attributes

Tested locally with mootools 1.4.2
I believe this solves https://github.com/mootools/mootools-more/issues/1218