There are 2 fixes for this bug. One is from me and the other from MartinC. To get my fix just download P3dO 1.5.3 and the Rsr2Png plugin. But as Ajax pointed out there are many thumbs with the problem here and there. So MatinC did a better fix in MacConverter itself. Lastest version of MacConverter - about 2 months from now - detect crashy .rsr and repairs them. Thanks Martin ;)) So you Mac guys should get the lastest MacConverter to get rid of this. Yarp

Yarp - author of P3DO Organizer for Poser