Having looked at this, I thought it maybe useful to others on here

 

http://www.impressivewebs.com/conditional-comments/

 

Use of conditional comments to target certain versions of Internet Explorer is pretty commonplace nowadays, and is generally seen as the best-practice method for including separate styles for IE.

...

 

But conditional comments have some unique possibilities and quirks that maybe you haven’t considered before, or have simply forgotten. Here is an overview of some things you may not know about conditional comments.

 

HTH

Useful article. +1

Excellent read; have learned a lot. Thanks! +1'd.