I notice that if I am in sketch mode and make a move/copy or any edit command of sketch entities, then select the sketcher icon in the working window upper right hand corner, not the menu, if part of the model solids or surfaces is under the icon I get a CTD. This is repeatable. Also, when in a 2d sketch, if I create an intersect curve with surfaces, the resultant curve cannot be edited unless I leave the current sketch mode and reactivate the sketch edit command.
Anyone else seen this before I report it?