I've also had this problem on a few occasions - so few that I have not been able to pinpoint what triggers it. As John said, closing and restarting Poser seems to always fix it.

I probably deserve a telling off for this, but I have not reported it to SM, simply because I have no idea how to reproduce the problem, and, whilst irritating, the workaround is not a huge imposition for me.

If there is anything I can do to diagnose the problem if/when it next occurs, I'd be happy to spend some time investigating. I'm using the AIR library GUI on a Core Duo (32 bit) Mac.

Edited to add: I'm almost certain I've seen this happen on Poses, Props and Materials. I very rarely save figures.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)