I've installed and reinstalled Marketpress and tried it on different themes, but I am continuing to have the same problem on http://www.tiarethomas.com.
When I click on the products page I get a 500 Internal Server Error and a large core dump file on the server. If I try to go into a product category I get a 404.
I noticed that when I deleted the plug in and reactived it the populated data remained the same. This there a way to completely wipe the install? Unless you know what is causing the above.