I would like to use CMS that can, from one install, manage multiple sites. The problem is, it must be installed on one domain, and the other domains must be parked on that domain. The advantages are obvious, less time spent on installs and upgrades, less space on disk taken up, etc. The question is, would this kind of install, running websites on parked domains, pose any problem in eyes of search engines? My guess (hope?) so far is that it wouldn't matter, at least not significantly?