I've tried using Biographia on two different WP installations. One under a Network (for tests and dummies) and another standalone one (for the real site) under two different servers. It works great under the network, but for some reason it doesn't work on the standalone.
When I try to install it automatically, it won't get past "decompressing". When I do it manually it seems to work, but when I go to "Settings" I get this:
Fatal error: Call to undefined function filter_input() in /webcp/docs/webs/206883/www/wp-content/plugins/wp-biographia/wp-biographia.php on line 4049
I hope it's something that can be fixed and not something on the server (which I kind of suspect).