First off, thank you for your plugin! I was looking for something like this for ages.
In general it's working great, however when I click to expand one of the years to view the months of posts for a category, it doesn't expand. Instead it clicks through to the full archive page (rather than staying on the sidebar and just expanding).
I've included the URL for you to view:
I'm using WP 3.2.1 - unable to upgrade because the host doesn't support a newer version of PHP.
I am pretty much at a loss at how to try and fix, so I'd appreciate any help or advice. Thank you!