I've noticed this for a year or so, and it's getting more pronounced.
When I'm publishing my site, my computer makes some "error sounds" during the Converting to Web Format process. Each of them is a low-pitched "bong". I hear similar bongs when something I enter in Excel, for example, fails to register or isn't of the right format.
What I hear with CSB is bong; bong-bong; bong-bong-bong; bongbongbong (three bongs very squished together). There don't seem to be any ill effects from this, but I get the impression that something is wrong with one or more of my pages.
I'm thinking about setting up a subdirectory to publish this site to, then pinning down the problem by deleting pages until the problem goes away.
In the meantime, I wanted to ask other people to see if they've ever experienced this problem.