I'm with Kemal - Most of the "Invalid Format" errors are caused by problems with the exporting app. For some reason, Poser 4, as well as propack, export .OBJs that have text data where Bryce expects numeric. This doesn't happen on all models. To see if you have the problem open the .OBJ in a text editor and search for #ind (PC) or nan (Mac). If you find some just do a search and repalce all, replacing the bad text with 0 (zero). I have the newest ProPack updates for both platforms and I still have the problem. It's definitely fixed in Poser5. I also agree with Slakker - I like the extra screen real estate. Best; Dan