I went ahead and chose "admin footer text," but it's only 1 of the 5 plugins that have either a) had a fatal error on activation or have b) display a fatal error within the widget when actually used.
Admin Footer Text
Fatal error: Call to undefined function: __construct() in /home/admin/domains/blogivists.com/public_html/wp-content/plugins/admin-footer-text/admin-footer-text.php on line 50
Avatars for MultiSite
Fatal error: Call to undefined function: __construct() in /home/admin/domains/blogivists.com/public_html/wp-content/plugins/avatars/avatars.php on line 73
Blogs Widget (Latest Blogs...)
Fatal error: Call to undefined function: get_blog_avatar() in /home/admin/domains/blogivists.com/public_html/wp-content/plugins/blogs-widget/widget-blogs.php on line 172
Admin Login Image
Fatal error: Call to undefined function: __construct() in /home/admin/domains/blogivists.com/public_html/wp-content/plugins/login-image/login-image.php on line 40
Ironically, the one pmudev plugin I have gotten to work is... WPMU DEV Update Notifications.
I'm running 3.1 on a three year old site. The server meets all requirements (latest php, mysql, etc).
I don't have a lot of other plugins running. I run Power Tools and Akismet. I've also installed Admin Tips and Message, but haven't given them a whirl yet.
With this in mind, the quarterly charge here is pretty damn steep all things considered.