I have a website that used to use Mambo but now converted to Joomla. I think there's something abnormal after this conversion. I recently purchased a VPS for my other websites and I really want to move my Joomla site to the VPS and have it rebuilt.

The PR of my joomla website is now 4. My question is: Is it going to hurt PR and SE indexing if I have the website moved and rebuilt?

ps: by rebuilt, I mean I'm going to install a new website using joomla and copy the old content to this new website. And of course, I'll keep using the same domain name.