You may have read about the new study in the Archives of General Psychiatry that (yet again) failed to find a link between mercury in vaccines and autism – a study that would have been expected to find some link if one existed. It’s been discussed in detail by Orac:
Also Steven Novella:
And in Science Based Medicine
Click the links – I really don’t have much to add.
I think we’re now at the stage when we can safely say that the people who still insist that the debate on this subject is not over, are in the same league as creationists, HIV-AIDS deniers and global warming deniers – ie they’re cranks.