[Plugin: WordPress SEO by Yoast] WP 3.1, WordPress SEO and Calendar Failure

I’m running Yoast’s WordPress SEO, with Atahualpa Theme, and had no problems until recently. A visitor reported the calendar widget (not separate plugin) wasn’t working well. No matter what you clicked on in the calendar, you were always redirected to the homepage. Not a disaster, but annoying.

Troubleshooting all my plugins showed the error to be solely within WordPress SEO; that is, it’s not a conflict w/ another plugin or combo of plugins. All I need is WP 3.1, Atahualpa and the plugin to get the problem.

I have not done any troubleshooting in other themes; taking my site back and forth is a lot of trouble…