Sorry you ran into this issue. The error seems to be that a mouse event hit the rig panel before information about the selection/drawing state had been initialized. I can see what ordering of operations would be required for this to happen, but haven't been able to figure out how to elicit it quite yet. I think the shortcut that might help here is to open the project while holding shift which clears some UI state and and can help avoid bugs that are related to selection state like this one. If this bug does survive and recur on a relaunch of the project, I would be a little curious to get a copy of the project (Alan's description of the process of zipping it up and using a file transfer service download link is spot on), but if you've already moved on, that's ok, too. Hope that helps! DT P.S. While this doesn't appear to be an issue in the scene itself, Alan's advice about forcing a full scene refresh is another useful trick to know. The one correction I'd make is that it is option and not shift that you should hold when clicking the refresh button on the scene panel. What this does under the hood is delete the temp.noindex directory from inside the Ch Data folder of the project. Strictly speaking, any case where you _have_ to do this is a bug, but it's still a good tip to know.
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