Yahoo disregarding my 301 redirect

[andrewshim]

I did a 301 redirect a couple of months ago. Prior to this, I noticed I had multiple URL versions in Yahoo (www, non www). I thought this would explain why I had dropped to page 10 for may main key words (duplicate content). After doing the 301 to redirect non-www to www, Y! has started showing ALL non-www instead of www URLs. This is exactly the opposite of what I need! All other search engines seems to be okay with my 301 redirect. Can anyone tell me why this is so?

[ecmedia]

Same dilemma for me. I moved a blog from blogspot to my own domain using a redirect. Google took a few months but eventually dropped all blogspot pages. Yahoo has simply not done anything. Even the home page of blogspot blog is very much there.