Index: gtk2_ardour/tempo_lines.cc
===================================================================
--- gtk2_ardour/tempo_lines.cc	(révision 11860)
+++ gtk2_ardour/tempo_lines.cc	(copie de travail)
@@ -230,6 +230,7 @@
 			//cout << "*** STEALING FROM LEFT" << endl;
 			assert(_lines.find(xpos) == _lines.end());
 			Lines::iterator steal = _lines.begin();
+			double		save = steal->first;
 			line = steal->second;
 			_lines.erase(steal);
 			line->property_color_rgba() = color;
@@ -240,7 +241,7 @@
 			invalidated = true;
 			
 			// Shift clean range right
-			_clean_left = max(_clean_left, steal->first);
+			_clean_left = max(_clean_left, save);
 			_clean_right = max(_clean_right, xpos);
 		}
 	}