Proportional Editing - Vertices moving for no reason I have an arm mesh. When I try to rotate some vertices with proportional editing some vertices move with it for no reason.



This doesn't happen with all vertices.

blend file
You have turned on 'X Mirror' for edit mode. This is a a tool which will mirror changes in edit mode across the object's local X axis.

In edit mode you can turn this off by going to the 'Options' tab in the 3D view toolbar (T) and turning off 'X Mirror'.