Comment 4 for bug 906794

Update: after the commit in revision 13487, the switcher symbol for the current crossing is visible again (for a Knot path effect applied to a single path, not though with groups - since the initial release of 0.48, the 'Knot' path effect is still broken when applied to a group containing individual paths). As described in comment #2 of related bug #1246550, an update of the switcher symbol is only drawn when the mouse pointer is moved after the change (no immediate feedback when position, size or direction of the switcher symbol has changed).