More interesting reading on this issue...
"If you are using a client-side meta-refresh or a JavaScript redirect, the search engine may mistakenly conclude that you are using doorway pages. This is because often the client-side redirects make use of doorway creators in order to feed one version of a page to the visitors and the other version to the search engine spider.
In the case of a 302 Temporary Redirect, the Page Rank and other authority factors are not transferred to the new page. This is because the search engine assumes that after a certain period of time, the page will be returned to its original location. Therefore, “301” is the safest method to redirect old pages to new ones."
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