Try clearing your cache and cookies.  Then come into the site by typing in www.renderosity.com to your address bar.  With new servers, the old bookmarks/favorites will no longer work.  This may be the main problem with most access difficulties.

The conversion is ongoing.  There are still a few bugs being worked out on the Gallery (over 700.000 images!!!) as well as conversion of such things as member homepages, the front page, directional pages, etc.  Sometimes the programmers have to take parts of the site down for a short time while they are readjusting things.

I hope something in this post helps!

~Viv

Fractals will always amaze me!