Check your PM inbox. Since it's 5:30 EST, I won't be able to work on this any more tonight (gotta head home, no net connection at the house currently), but keep me updated regarding if you're able to find anything else out.
Additionally, I found that the .htaccess file is missing a couple of rules regarding Manufacturer pages (for Sorting), the .htaccess file has been updated in the repository, but I haven't been able to package a new release yet.
Here's the .htaccess file via the repository:
http://x-cart-seo.googlecode.com/svn/trunk/.htaccess