Actually it seems to be a different issue, possibly a bug. The categories I have that are one word will show up with either pictures or text, but the categories where the category name is more than one word long will not show up. It seems that it’s trying to filter by the litteral category name instead of the category slug.
For instance, the category called “Web Tips” has a category slug of “web-tips”, but when you click on the filter, the URL query shows up like this:
http://www.buzzfrag.com/gallery/?category_name=Web%20Tips
which returns a null value. Instead the query should search for the category slug like this:
http://www.buzzfrag.com/gallery/?category_name=web-tips
When I adjusted the URL to this query, the Web Tips category shows up. Just thought I’d share. Hopefully there’s a simple fix for this. If I find one, I’ll be sure to share it.