I was just making a new ad unit for one of my blogs and have noticed that when generating code for an ad unit in a channel that the channel code is no longer just a number but the name of the channel and the date you created it as well as a numerical code for the channel.
So the code now includes a line like this:
//2006-09-24: ProBlogger Main
I’m not sure why they’ve made this change. The previous numerical channel code is still in the code so they must have added it for some reason.
Unless there’s some pretty good reason for it I’m not sure I would want the code there as I know serious AdSense publishers do at times look at the source code in each others pages and I know some publishers use channel names that can be quite revealing about their AdSense strategy.