I don't think there's anything "special" about my ZClass. It's derived from Catalog Aware and ObjectManager. I believe I reproduced it without the Catalog Aware and got the same results.
I'm using Andy Dustman's version of the MySQLDA and TinyTable v0.8.2. They both work just fine once I get the objects in the right place. Maybe the problem just happens to be with these two products, but I have no clue.
You're welcome to fetch the product at ftp://ftp.logicetc.com/pub/Zope/IssueTracker.zexp if you want to give it a look. It's a one day throw-together port of the issue tracking system used by the PHP project with modifications for my own needs.
OK, I downloaded it and I think I found your problem (not wure how to remediate this, though). If you look in the source of the management screen http://localhost/<somefolder>/<IssueTrackerInstance>/manage_main, the dropdown list for adding Product looks like this: <FORM ACTION="http://localhost/<somefolder>/<IssueTrackerInstance>/" METHOD="GET"> <SELECT NAME=":method" ONCHANGE="location.href='http://localhost/testhier/blup/'+this.options[this.selectedIndex].value"> <OPTION value="manage_workspace" DISABLED>Available Objects <OPTION value="manage_addProduct/OFSP/documentAdd">DTML Document <OPTION value="manage_addProduct/OFSP/methodAdd">DTML Method <OPTION value="manage_addProduct/MailHost/addMailHost_form">Mail Host <OPTION value="manage_addTinyTableForm">TinyTable <OPTION value="manage_addProduct/OFSP/manage_addUserFolder">User Folder <OPTION value="manage_addZMySQLConnectionForm">Z MySQL Database Connection </SELECT> <INPUT TYPE="SUBMIT" VALUE=" Add "> </FORM> As you see, most of the items have a manage_addProducts/.... as a start. Not so with TinyTables and MySQLConnection. They call the add_TinyTableForm and manage_addZMySQLConnection form. They do not switch the namespace to manage_addProduct (not in the form). Why this is a problem, I can't tell, but this _is_ the problem. I'm not quite sure about the solution. Probably it's best to make a custom manage_main form that does the right incantations for adding products and then map this to your Contents View in the ZCLass definition. As a side I'd like to remark that all products should comply with the same manage_addProduct interface, because the current situation leads to nasty problems. Rik