I see many domains PR3 and so that are currently available to be registered from anyone. Some of them still have the PageRank but majestic reports 0 links for some of them.

Since the PR was just updated and there aren't any links to them shouldn't the PR be 0?
Or majesticseo reports 0 for dropped domains, regardless the actual links to it?

Would you register a PR3 domain without any links to it, knowing that google just updated toolbar PR few days ago and the PR is supposed to be real?

Any light on that would be appreciated!