g1smd - 8:15 am on Oct 1, 2012 (gmt 0)
Once blocked in robots.txt, Google will continue to show the URLs as URL-only entries in the SERPs.
URLs that redirect should not be blocked. Google needs to see the redirect.
Other duplicate pages could be handled with the rel="canonical" tag, and should not be blocked.
It looks like Google has not indexed individual search results pages from your site, merely the search page with no search paramaters.
The pattern for disallow matches from the left and a * can be used as a wildcard to replace characters that change when you want to match something specific further to the right.
blocks "slash" "something, anything" "question mark" "anything or nothing"