Login redirects users to main dashboard instead of their blog?

I've set up a bunch of multisites the same way, but this time I've probably fudged something minor and just can't find it.

Users are able to register and create sites fine, but after they log in they are taken directly to the main blog's dashboard, instead of to the one they're trying to login to.

Did I mess something up with the wildcard redirect? Or is this a new 3.1 issue.

If it helps, I'm using the templating plugin, and the password creation plugin.

Thanks very much...