Index: trunk/src/scriptbuilder/gui/ScriptBuilderFrame.java
===================================================================
--- trunk/src/scriptbuilder/gui/ScriptBuilderFrame.java	(revision 73)
+++ trunk/src/scriptbuilder/gui/ScriptBuilderFrame.java	(revision 78)
@@ -234,5 +234,5 @@
         zoomSlider.setMinimum(((timelineTickPanel.getVisibleRect().width - 20)
                 * ScriptBuilderGuiConstants.HORIZONTAL_TICK_RESOLUTION)
-                / Math.max(script.absoluteLength(), 1));
+                / Math.max(script.absoluteLength(), ScriptBuilderGuiConstants.TICK_TIMELINE_SMALLEST_LENGTH));
         zoomSlider.setMaximum(zoomSlider.getMinimum() + 20);
     }