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To rel-canonical or to 301, that is the question. We're frequently running an A/B split test on our home page to optimize conversion.  As a result about 10,000 backlinks to our homepage point to the B page.  (If we're running a test when a blog or newspaper checks us out, there's a 50% chance they're diverted to the B page. So when they copy our home page URL, they're unknowingly copying the B page link.) We can't contact all of these sites and ask for them to change their links.  A lot of the links are from big organizations that aren't interested in tweaking the links of old articles. So should we rel-canonical or 301 the B page?  We consistently use the same URL for our B page tests, so we'd only have to 'fix' one page. Thanks in advance!