I recently upgraded my website from Joomla 1.5 to Joomla 3.0 and I have been getting a crazy amount of traffic through 206 codes than previously with Joomla 1.5. I don't know where to start to go looking for the problem if it even is a problem (if it's just part of the Joomla upgrade) so can someone give some insight to what steps should I take to prevent the amount of bandwidth being used by these HTTP status codes?
I don't think it is a problem. Your server should only respond with
206 Partial Content if the client requested only part of a document.
This might happen if the request got interrupted the first time for any reason (including the user pressing the stop button in the middle).
This may have started happening all of a sudden because your webserver now supports features that can enable it such as ETags or LastModified.