twitter/bootstrap — pull request #3935 by benvinegar (2012-06-26 00:40:54+00:00)
Title: Fix Opera .clearfix bug when using contenteditable

Fixes a bug w/ the .clearfix trick affecting Opera browsers when there is a contenteditable div on the page. We ran into this ourselves w/ Disqus, but it has been reported by at least one other user on Nicholas Gallagher's blog post:

> In Opera 11.62 if on page we have any div.clearfix and any ```

```, the blocks with clearfix have additional height.

http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952

In the comments, Nick suggests using ```height: 0``` or ```font: 0/0``` – we made this fix before finding the blog post (sigh), and found ```line-height: 0``` worked fine.

If you're curious *just how much height* this added, here's a screen shot of Disqus in Opera 12 *before* this patch was applied: http://dl.dropbox.com/u/421333/Screenshots/avu~_coot-_-.png