I have the same problem too. I moved 3 domains into my Afternic account a few days ago and changed the nameservers to the NS1 & 2 Afternic servers. All that happened was that the 3 domains resolved to a blank page with the helpful (not) message "An error has occured". I have now moved these 3 domains back onto the standard GD servers. At least the GD page resolves to something...
I also checked all my other Afternic listed domains, which previously had resolved to parking pages. After selecting images and keywords, they looked relatively attractive to land on. Checking today, I find all my Afternic parking pages have been knocked out, to be replaced with a dark grey page with a few seemingly unrelated links, with a neon green strip at the top saying For Sale on Afternic.
I never authorised these utterly awful, dismal, landing pages. What happened to my Afternic (Smartname) parking pages? What the bleep is going on with Afternic?!