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.