Fatal error: Cannot redeclare wpcirruswidgetinit() (previously declared in /home/users2/t/top10/domains/shnaiderman.ru/wp-content/plugins/wp-cirrus/wp-cirrus.php:38) in /home/users2/t/top10/domains/shnaiderman.ru/wp-content/plugins/wp-cirrus/wp-cirrus.php on line 38
I saw a warning about incompatible tag cloud plugins, though, WP-Cirrus 0.6.8 declares itself as "Compatible up to: 3.2.1" (I use 3.4.1). Wouldn't it be nice to add a list of incompatible plugins in FAQ or somewhere...? I, myself, ended up with 3D Tag Cloud, it looks compatible.
Here's a link to the same bug report on WP-Cirrus support forum.