[nimbupani]

I created the design, and it is a deliberate use of those tags to create graphical elements which you can see in the background. It should be diagonal in browsers that support CSS transforms, and vertical in browsers that dont.

http://html5doctor.com/i-b-em-strong-element/

[ecaron]

I figured there was a great reason, I just didn't know how to begin finding that answer short of asking the experts.