messages and pupmenu()s. Edited spelling and grammar, stylistic consistency, etc. I added the guidelines and rationale that I used to the CMS here: http://www.blender3d.org/cms/Language_and_terminology.338.0.html Next step is to get icons in there, to make it easier to see at a glance what sort of message (and how much attention should be paid to it, or if it can be dismissed with a flick of the mouse, eg. boring remove doubles notifications) mockup: http://mke3.net:9000/blender/ui/controls/error_ok_icons.png