Interesting realization regarding compliance

I recently went through all of my templates and custom code and swapped out every instance of <br> with <br />, so that it's a closed function. What I didn't realize until today after passing my site through W3's validator a few times was that img tags need the same treatment.

For example:

<img src="blah.gif" alt="woohoo"> = Non-compliant
<img src="blah.git" alt="woohoo" /> = compliant

After wondering what the heck it was barking at for so long, I finally realized what it was. Just thought I'd pass it on.

/me is down to under 10 errors on his forum page, and is actually excited about it.