FWIW, my Debian box (running unstable) is giving me the same messages. I've been ignoring as other things have priority right now but this might be a good time to track this down and take care of it. I've had Zope on here since 2.3.x but I've added in a few more products, both through Debian's dselect and directly. I'll take a look and report anything I come up with, I'll watch this space for any suggestions.
Well, I have Debian...and I assume some products are kept in /usr/lib/zope/lib/python. The reason I'm going here is because SearchIndex isn't listed in the Products listing in the Control Panel. There's a Products directory directly under /usr/lib/zope/lib/python, which has most of the products listed that I see from the Control Panel. As far as what products I have...nothing really special, mostly what came with zope when it was at 2.1 and whatever's been added to it until 2.5...I've only personally added the zope tutorial and formulator, along with a few of the *SQLDA's.... Chris