[Zope] Product causes connection refused message

Hello, Is it possible for a Zope product to cause the web browser to display a "Connection refused" message, without leaving any tracks what so ever in the Zope error-logs? Because that's what we're experiencing (mostly with CMFBoard). The folder contents show up just fine in Plone, then I click an object and boom - Connection Refused. I go back to the folder contents - no problem. The reason I ask this here is that I do not know if this bug has to do with Zope and ZServer or with CMFBoard. Thanks for any advice, -Petter-