tedster - 6:19 pm on Oct 29, 2006 (gmt 0)

It's very possible that this is the result of googlebot crawling ptterns, and not something you can "fix" directly. It may be a result of low PR and the infrequent spidering that can result. If you have a Supplemental Result tag on a url, that can mean spidering on a much less frequent basis. But apparently you don't, so that's not the answer.

What do your logs say -- has googlebot requested your Home Page since Aug 31?

Some factors I can think of that might be under your control rather than Google's:

1. Does the domain root resolve directly as your page, or does it redirect to an inner URL?

2. Do all your Home links in the site point to the domain root, rather than to "index.php" or whatever the filename is?

3. Have you updated the Home Page in any way? This "shouldn't" matter -- but when the content is not modified since the last crawl, there's a new method for handling cache dates being worked out. That might still be buggy.