Trish, thanks for the reply!
I should have elaborated on what I'm experiencing. I do set the edit condition for "Edit Vertices", although I do it with a menu icon in a modified Editor Toolbar (Customize / Toolbars / Commands).
Currently, my map is a mix of symbology, some just symbolized, some symbolized and then a Cartographic Representation created for that layer. The inability to edit individual vertices usually occurs when I attempt to do a touch-up edit of a street centerline while in Layout View. The condition occurs randomly, but once it happens, it seems to want to stick around. It can start when I attempt to edit a vertex on either a symbolized layer or a layer with Representation.
The really frustrating part is when I have to stop working on my map altogether. Open a new, blank map and try to edit the centerline vertices in Data View. The inability to edit individual vertices occurs even after I load up just one Feature Class in a blank map!
A restart of my computer usually clears the condition - for a while.
Is anybody else experiencing something like this?
Gregory