I am a plugin hog too. But sometimes due to the way each individual plugin makes calls to various parts of the WP core, some plugins conflict with one another. You might try disabling all your plugins, then turn on that one. If it works, then some other plugin isn't playing nice with it.
And I have over 60 active plugins on my personal blog and they all so far (knock on wood) get along famously with each other. Mostly it's fun stuff like twitter, last.fm, stats, etc. :-)
And Gene, if you are brave, you can go ahead and edit (a copy of) that plugin to get the styling the way you want. Some plugin authors are kind enough to provide styling hooks realizing that there are a gazillion different themes in use out there. ;-)