g1smd - 7:34 am on Aug 3, 2013 (gmt 0)
In the pattern
.*$ part is redundant as you are not capturing or reusing the information, nor should you. The
^ also means the redirect only works if "new" is the first parameter.
You had two options.
1. Redirect these requests to the canonical URL for the page. I would do that if the links are bringing useful traffic.
2. Return 404 so these URLs are simply ignored by Google. Some people would freak out at seeing long 404 reports in WMT but since you know the links are all bad, this is not a problem.