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Hi Alan, We've been testing a new internal search tool for the last few weeks.  We agree that the results are not as good as with our previous tool, and have already started the process of switching back - you should see an improvement in the next week or two. Sorry for the inconvenience and thanks for your feedback!

Hello Alan! DON'T use the 301 redirect in this case, because you will certainly create a loop, and then nobody will access the filtered page. I am optimizing a e-commerce site, that has some duplicated content too. We are trying just now to use some canonical, and it looks it's going well. I think that this time your client should pay for, it will surely worth it. You could also use some meta robots in this case. It can be complementary just with the canonicals.  Here is a good and quick explanation: http://www.robotstxt.org/meta.html  Hope it helps! =]

I'll take a stab. You can use a 301 redirect to enforce your canonical URL. In this case, it may be that site decided that /home.aspx is the canonical and wanted to be sure any links out there go to it. This is a strong signal to the search engine that if it has both www.domain.com and www.domain.com/home.aspx indexed, the /home is the URL for the juice. Now, that assumes this was done on purpose and not just some silly mistake. I've seen sites with 4 URLs for the main page: www.domain.com www.domain.com/home.aspx domain.com domain.com/home.aspx You can read up on Google, but one way to fix this problem is to redirect 3 of the 4 to the canonical URL.

Thank you for your help, will have a look at these links.