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Robert_Charlton - 7:41 am on Oct 23, 2010 (gmt 0)
JohnMu did suggest not making any changes on your own site, and I would tend to trust him.
It could well be that the canonical change reported on the Google thread happened after Google fixed the problem. As Sgt_Kickaxe reports, his blog is apparently working well now, though he doesn't mention whether he has a canonical tag on it.