I'm also having some problems:
It's the MH alpha 3b, with Aqsis 1.4.2, Windows XP.There where some errors reported while rendering (all in red):
08/12/2009 17:10:29 ERROR: Found a non-manifold vertex in the control hull of object "unnamed" at vertex 12
08/12/2009 17:10:36 ERROR: Found a non-manifold vertex in the control hull of object "unnamed" at vertex 19
08/12/2009 17:11:19 ERROR: Found a non-manifold vertex in the control hull of object "unnamed" at vertex 13
08/12/2009 17:11:31 ERROR: Found a non-manifold vertex in the control hull of object "unnamed" at vertex 11
08/12/2009 17:21:31 ERROR: Invalid state for RiWorldEnd [BeginEnd]
08/12/2009 17:21:32 ERROR: Invalid state for RiFrameEnd [BeginEnd]
This post was made thanks to Me, Myself and I.