I just uninstalled Poser 7 all together today after it totally crapped out when trying to open PZ3 files from my windows Start menu's Recent Documents menu. It was also causing Poser 6 to error out when trying to reload files this way. 

No loss to me as I really havn't used Poser 7 much since it came out. Poser 6 works fine again after removing Poser 7 and fixing all my Poser file associations in the registry and pointing them back to Poser 6. I do most of my morphs in Zbrush and when I animate I use Mimic anyway, so the features of Poser 7 were pretty redundant to me. I can still use the Poser 7 figures in my Poser 6 Faceroom just fine with the right hack!