We recently added support for Google Analytics link tracking tags to all routes. This update was designed to provide our users with additional reporting / insight into the traffic delivered to their sites via social media.

For example, when adding these tracking tags, dlvr.it appends '?utm_source=dlvr.&utm_medium=twitter' to your link URLs.

For the majority of users, this addition tracking code adds additional insight & visibility to website analytics reporting.

However, for some users, these tracking tags may result in visitors ending up on an error page on your site.

Here are details on removing Google Anlaytics tracking tags from your links:
http://support.dlvr.it/entries/20477878-how-do-i-remove-google-analytics-tags-from-my-links