IE conditional comment gotcha

Here's one for the books:

<!-- [if IE]>

<p>Some IE-specific stuff here</p>

<![endif] -->

This will be ignored by IE. Why?

Because IE doesn't like the whitespace between the comment delimiters and square brackets. Here's the correct way:

<!--[if IE]>

<p>Some IE-specific stuff here</p>

<![endif]-->

Note the difference:

<!-- [if IE]> (bad)
<!--[if IE]>  (good)