With the latest updates (3.85 and 3.87) the catagory menu stops working if I change any of the settings. If I change a setting all it does is refresh the page instead of filtering the results. If I add the catagory menu to the page and don't change any settings it works, however, when I added the catagory menu to the product details page, it won't work because I have to tell it to go to the shop page.

Any advice would be great: www.buypeplink.com to see for yourself.

Do you have the buynow page name selected in the category menu settings. In product setup did you add a value for seo url.

I just setup a new portal running cart v3.87 here http://www9.smith-consulting.com and it filters products when the category menu is on the same page as buynow and also the cat menu is on the product details page. Do you have any errors in your dnn event viewer. In order to fix it we need to be able to replicate it.

Great job on finding the fix! I'm testing it on my sandbox now.... :)