Google has introduced new version of tracking code for Analytics. Old Urchin code (they call it Legacy Tracking Code now) is still working but:

"Please note that urchin.js will not receive feature updates and is not compatible with new features."

Also:

"We recommend that you do not include both tracking code snippets together on any given page. Doing so might generate inaccurate report data. You can, however, migrate select pages of your site to the new tracking code while the legacy code remains on others.