Did that work and install the latest version? You usually don't do it manually because your package manager (by default) periodically does checks for updates (i.e., it runs apt-get update which refreshes the indexes of the repos given your sources.list to identify updates). I know Ubuntu bugs the hell out of me by saying I have updates every day I need to look up (which amounts to clicking "okay" to update).
Yeah it did. My manager hasn't been much of a manager in this respect. Im not sure if its a bug in Mint 13 or if I havn't configured my settings correctly.