All of the blogs on the multi-site are updated to the latest version (3.6.1) and all plugins and themes are up to date.
The manual installations are done to in order to limit the number of plugins that are available. There are several dozen blogs being hosted with hundreds of users with editing and administrating roles. Automatic plugin and theme installations are disabled and everyone must go through me to get plugins and themes approved for use. If a plugin causes a problem (such as wp-biographia), it is easier for me to find the issue and fix it.
Unfortunately, due to the size of the multi-site setup, I cannot disable and check against all plugins. However, I can check the plugins currently active for any conflicts and get back to you.