First off, thanks everyone for your input! I had also sent out an e-mail to CL tech support who in the past haven't been a whole lot of help but the response I got was right on the money and, honestly, the best tech support relply I've ever had for Poser Mac. What I didn't mention above (and should have!) is that I just copied all my apps from my old computer to my new one over Ethernet connection - while all the other apps worked fine, this turns out to be a real problem for Poser. So I reinstalled (ick) but now everything is working fine! I thought I'd post the tech e-mail from Colin Gerbode: "To properly diagnose this, can I get a few more details from you? Specifically, how did you install Poser on the G5- did you run the installer, or copy it over from another system? Have you renamed your hard drive? Does your current user account have full read & write privileges over the Poser 5 folder and all its contents? Here's why I ask. If you drag-copied Poser over, some items may not have transferred properly. The errors you describe lead me to suspect that certain plugins and essential libraries did not get installed properly, or perhaps Poser isn't reading them correctly. In particular, the export crash makes me think that perhaps the proper import/export plugins aren't properly installed in the Runtime folder. Alternatively, all the files could be installed, but if your current user account doesn't have read/write permissions over the Poser 5 folder and all its contents, Poser may not be able to read (or write) all the files it needs in order to operate. Similarly, we've seen problems when users have changed the name of the hard drive Poser is installed on- typically this only becomes an issue the first time you launch Poser, as it tries to write the little file containing its serialization information back to the hard drive named "Macintosh HD", and if it can't, it'll quit unexpectedly. Once the serialization information is written, though, it shouldn't matter what you call your hard drive, but it might make a difference. Make sure that your current account has the appropriate permissions, back up your Runtime folder and try re-installing Poser (it won't wipe out your custom items, if you have a Runtime full of third-party stuff- it'll just overwrite the default documents, but it's always a good idea to keep a backup.)" Thanks guys! Dan