nippi - 4:23 pm on Oct 4, 2011 (gmt 0)
i did it as a test but with a 301 to root rule rather than 301 to matching pages rule.
Within 3 weeks, had a new site up not hit biy Panda.
Within 2 months, had a new site, hit by panda, as it had all the same problems as the inital site.
changing urls is not the answer.