line-height: 1.2; causes editor to hang

Ckeditor 4.4.0 (loaded from cdn) was hanging with a particular string of HTML. It turned out that style="line-height: 1.2"; (using line height with number format, and no unit or %) within an <a> tag after the href="" was causing ckeditor.js to hang in recent versions of Firefox and IE.

For my own client I am not looking for a fix because (once found) it is easy enough to modify the HTML. Still, it may be worth others checking whether they can reproduce this behaviour.

I am uploading the entire body text which caused the problem, in a zipped text file (zipped to protect my client for having it crawled by search engines in this location).