It's rather unlikely, but is it something to do with this setting in Preferences? (I don't even know if you have that setting in Poser 6).

(edit) by jingo he's quick on the draw.

"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)