[Plugin: WordPress Category Archive] Support for 3.2.1?

Hi, I’m running a WordPress 3.2.1 and wondering, if the plugin isn’t compatible with that? Choosing a month/year combination only shows the category with all posts in it, but with a URL like this: website.com/2011/08/?cat=3

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