99.999% of people would never notice this nor care about it, but a Google Webmaster Help thread has discussion around a very small bug in Google’s cache. If you view the cache of a W3 document for a match on xml well formed root, you will notice that Google says they will highlight the words “root” in a red color. But if you scan through the document, you will notice Google is not highlighting that word in red.

Here are pictures:

Googler, JohnMu, thanked the person for reporting it and has submitted the bug to the right team.

I am shocked that it was reported and noticed.

Forum discussion at Google Webmaster Help.