That line should just say Inodes. I'm guessing that either your skin is corrupted or you're using a third-party-skin or a corrupted language-pack.
I'd suggested you switch to the enhanced skin for testing if you're not already using it, but if that doesn't help then you should both make sure DirectAdmin is updated to the latest version, and also then if that doesnt hel then download and manually install a new copy of the skin.
Jeff