Index: src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java
===================================================================
--- src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java	(revision 7608)
+++ src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java	(working copy)
@@ -48,8 +48,8 @@
 import org.openstreetmap.josm.gui.layer.Layer;
 import org.openstreetmap.josm.gui.layer.MapViewPaintable;
 import org.openstreetmap.josm.gui.layer.OsmDataLayer;
-import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
 import org.openstreetmap.josm.gui.util.GuiHelper;
+import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
 import org.openstreetmap.josm.gui.util.ModifierListener;
 import org.openstreetmap.josm.tools.Geometry;
 import org.openstreetmap.josm.tools.ImageProvider;
@@ -622,7 +622,7 @@
         Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
         boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
         // segmentAngleZero marks subset of nodeOverlapsSegment. nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
-        boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
+        boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-2;
         boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
         ArrayList<Node> changedNodes = new ArrayList<>();
         if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
@@ -652,7 +652,7 @@
         //find if the new points overlap existing segments (in case of 90 degree angles)
         Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
         nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
-        segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
+        segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-2;
         hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
 
         if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {