Are Search Engines Crawling Links in HTML Comments?
link = 'http://' + somevariable + '/somepage.php' + someothervariable;
Google decided that it would be a good idea to check out '/somepage.php' which of course is invalid without the variables before and after it.
So what this long-winded intro leads me to is the question of what is the current state of affairs at Google (and the other search engines) when it comes to links in HTML comments? I should have an answer to that in a few days...
Update: January 8, 2009
My experiments suggest Google isn't crawling links that are within HTML comment tags.