[Plugin: WordPress Category Archive] previous/next_posts_link throw to Page Not Found

The plugin works for a first page of results, but trying to navigate to Page 2 throws to a Page Not Found error.

An example:
http://www.oldsouldesign.net/photoblog/2008/11/

The permalink structure is /category/year/month/.

I haven’t found this issue raised elsewhere, but I have run into it with two different WP implementations. Does anyone know of any fixes?

Thanks!

http://ww.wp.xz.cn/extend/plugins/wp-category-archive/