PR to non-active domain

[jojy]

Hello,
I have domain set (.com, net, org) where only one website is active (.com) the rest of the two sites are simply redirecting users to the main website. Last night I was checking my sites and found one of the redirected domain (.net) has PR 4 and my main website PR is 3.

That domain has no backlink and no reference any where, I am wondering what google has seen in that non-active domain which is simply redirecting to another site?

Is there any way to move that PR to my main site?

Thanks

[tedster]

I'd suspect bad data in the toolbar - or more accurately on Google's PR server, if you are seeing the PR4 through some other utility. If your redirect is returning a 301 http status, then you are already moving as much link juice across as you can.