Just a addendum... This happens if you hit the zero on the numerical keyboard, like if you were typing in a dial setting and the field wasn't properly selected (my guess is that's what happened) - it happens for me all the time and I HATE it LOL

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.