Attached Link: http://www.soft-rabbit.com/

To my knowledge, Maconverter is entirely innocent... :-) There are various theories about the nature of the bug, some have claimed it is caused by "empty g lines", some think it is caused by manually removed vector data. Whatever it is, there is no sign of any attempt to fix the bug, so people probably have to live with it. The good news is that you don't have to use VirtualPC - Poser4 is perfectly able to load all morph targets on Mac (and different to PC it is very simple to have both P4 and PPP on the same machine). Just import morph targets with Poser4, and then copy them with Maconstructor (link above) into PPP files.