traced bug with tooltip blocking selection to conflict with jquery focus(). Have commented out where attempting autofocus on modal form open etc as tooltip more important for now. Will fix - hopefully boostrap 3 will resolve this.
When focus() on item with tooltip attached, will go into endless loop. Will also run into difficulty where can't select in listbox if focus on submit button in 1 form - variety of weird errors all hinging on focus() - though obviously it is the tooltip code that is the issue and not jquery focus().