Curious for the forum's take. My parents work in special ed so I get these stories on the ticker all the time:

[whoops, can't post links. It's a CNN story about thimerosal and Autism, you can run a search]

I was under the impression that links between thimerosal and Autism were always hazy at best, but the public at large became convinced after a poorly regulated study in the 1980s. This further suggests that the link is probably specious, although it seems like further research is required to determine anything for sure.