Hi Will,
The only thing i can think of is i'm using a custom skin, but I've switched the skin on just the page I've deployed to xcilion and i'm still getting the error. I don't understand because prior to doing this i installed on a fresh copy and didn't have any problems. I do have ActionForm installed and i know I've ran into it affecting other modules in the past but it's difficult to diagnose as i don't see any errors in the console just on the deployment of the category viewer module.
http://newgfs.qswebdev.us...tore/Category-Viewer