diff --git a/gtk2_ardour/ardbg b/gtk2_ardour/ardbg
index 95466a42b8..ab99296f45 100755
--- a/gtk2_ardour/ardbg
+++ b/gtk2_ardour/ardbg
@@ -1,4 +1,5 @@
 #!/bin/sh
 dir=`dirname "$0"`
 . $dir/ardev_common.sh
+LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
 exec gdb $EXECUTABLE $*
diff --git a/gtk2_ardour/ardev b/gtk2_ardour/ardev
index ff68e11fbe..5dd8fc9d13 100755
--- a/gtk2_ardour/ardev
+++ b/gtk2_ardour/ardev
@@ -1,3 +1,4 @@
 #!/bin/sh
 . `dirname "$0"`/ardev_common.sh
+LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
 exec $EXECUTABLE $*
diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index fec951f9d2..cae06c0612 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -1071,7 +1071,7 @@ Editor::connect_to_session (Session *t)
 
 	session_connections.push_back (session->SMPTEOffsetChanged.connect (mem_fun(*this, &Editor::update_just_smpte)));
 
-	session_connections.push_back (session->tempo_map().StateChanged.connect (mem_fun(*this, &Editor::tempo_map_changed)));
+	session_connections.push_back (session->tempo_map().StateChanged.connect (bind (mem_fun(*this, &Editor::tempo_map_changed), false)));
 
 	edit_groups_changed ();
 
@@ -3625,7 +3625,8 @@ Editor::canvas_horizontally_scrolled ()
 {
 	/* this is the core function that controls horizontal scrolling of the canvas. it is called
 	   whenever the horizontal_adjustment emits its "value_changed" signal. it executes in an
-	   idle handler.
+	   idle handler, which is important because tempo_map_changed() should issue redraws immediately
+	   and not defer them to an idle handler.
 	*/
 
   	leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
@@ -3637,7 +3638,7 @@ Editor::canvas_horizontally_scrolled ()
 	}
 	
 	update_fixed_rulers ();
-	tempo_map_changed (Change (0));
+	tempo_map_changed (Change (0), true);
 }
 
 void
@@ -3686,7 +3687,7 @@ Editor::idle_visual_changer ()
 			/* the signal handler will do the rest */
 		} else {
 			update_fixed_rulers();
-			tempo_map_changed (Change (0));
+			tempo_map_changed (Change (0), true);
 		}
 	}
 
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 43f170f679..bf960f9f8e 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -1174,7 +1174,7 @@ class Editor : public PublicEditor
 	Gtk::Allocation canvas_allocation;
 	bool canvas_idle_queued;
 	void track_canvas_allocate (Gtk::Allocation alloc);
-	bool track_canvas_idle ();
+	bool track_canvas_size_allocated ();
 
 	void set_edit_cursor (GdkEvent* event);
 	void set_playhead_cursor (GdkEvent* event);
@@ -1275,7 +1275,7 @@ class Editor : public PublicEditor
 	void remove_metric_marks ();
 	void draw_metric_marks (const ARDOUR::Metrics& metrics);
 
-	void tempo_map_changed (ARDOUR::Change);
+	void tempo_map_changed (ARDOUR::Change, bool immediate_redraw);
 	void redisplay_tempo ();
 	
 	void snap_to (nframes_t& first, int32_t direction = 0, bool for_mark = false);
diff --git a/gtk2_ardour/editor_audio_import.cc b/gtk2_ardour/editor_audio_import.cc
index 2a8f2a4516..28911b8ea6 100644
--- a/gtk2_ardour/editor_audio_import.cc
+++ b/gtk2_ardour/editor_audio_import.cc
@@ -40,6 +40,7 @@
 #include "sfdb_ui.h"
 #include "editing.h"
 #include "audio_time_axis.h"
+#include "utils.h"
 
 #include "i18n.h"
 
@@ -315,7 +316,8 @@ Editor::embed_sndfile (vector<Glib::ustring> paths, bool split, bool multiple_fi
 				choices.push_back (_("Embed all without questions"));
 			
 				Gtkmm2ext::Choice rate_choice (
-					string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"), path),
+					string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"), 
+							short_path (path, 40)),
 					choices, false);
 				
 				int resx = rate_choice.run ();
diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index 3f70322573..87e593b0ea 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -280,7 +280,7 @@ Editor::track_canvas_allocate (Gtk::Allocation alloc)
 	if (!initial_ruler_update_required) {
 		if (!canvas_idle_queued) {
 			/* call this first so that we do stuff before any pending redraw */
-			Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_idle), false);
+			Glib::signal_idle().connect (mem_fun (*this, &Editor::track_canvas_size_allocated), false);
 			canvas_idle_queued = true;
 		}
 		return;
@@ -288,11 +288,11 @@ Editor::track_canvas_allocate (Gtk::Allocation alloc)
 
 	initial_ruler_update_required = false;
 	
-	track_canvas_idle ();
+	track_canvas_size_allocated ();
 }
 
 bool
-Editor::track_canvas_idle ()
+Editor::track_canvas_size_allocated ()
 {
 	if (canvas_idle_queued) {
 		canvas_idle_queued = false;
@@ -321,7 +321,6 @@ Editor::track_canvas_idle ()
 		full_canvas_height = height;
 	}
 
-
 	zoom_range_clock.set ((nframes_t) floor ((canvas_width * frames_per_unit)));
 	edit_cursor->set_position (edit_cursor->current_frame);
 	playhead_cursor->set_position (playhead_cursor->current_frame);
@@ -363,7 +362,7 @@ Editor::track_canvas_idle ()
 	}
 		
 	update_fixed_rulers();
-	tempo_map_changed (Change (0));
+	tempo_map_changed (Change (0), true);
 	
 	Resized (); /* EMIT_SIGNAL */
 
diff --git a/gtk2_ardour/editor_rulers.cc b/gtk2_ardour/editor_rulers.cc
index 7f6ac56d5b..30bcff093a 100644
--- a/gtk2_ardour/editor_rulers.cc
+++ b/gtk2_ardour/editor_rulers.cc
@@ -705,7 +705,7 @@ Editor::update_ruler_visibility ()
 	
 	update_fixed_rulers();
 	//update_tempo_based_rulers();
-	tempo_map_changed(Change (0));
+	tempo_map_changed(Change (0), false);
 
 	time_canvas_event_box.show_all();
 	time_button_event_box.show_all();
diff --git a/gtk2_ardour/editor_tempodisplay.cc b/gtk2_ardour/editor_tempodisplay.cc
index da856aa8a4..7647de8ca6 100644
--- a/gtk2_ardour/editor_tempodisplay.cc
+++ b/gtk2_ardour/editor_tempodisplay.cc
@@ -94,13 +94,13 @@ Editor::draw_metric_marks (const Metrics& metrics)
 }
 
 void
-Editor::tempo_map_changed (Change ignored)
+Editor::tempo_map_changed (Change ignored, bool immediate_redraw)
 {
 	if (!session) {
 		return;
 	}
 
-        ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::tempo_map_changed), ignored));
+        ENSURE_GUI_THREAD(bind (mem_fun (*this, &Editor::tempo_map_changed), ignored, immediate_redraw));
 
 	BBT_Time previous_beat, next_beat; // the beats previous to the leftmost frame and after the rightmost frame
 
@@ -135,18 +135,27 @@ Editor::tempo_map_changed (Change ignored)
 		current_bbt_points = 0;
 	}
 
-	redisplay_tempo ();
+	if (immediate_redraw) {
+
+		hide_measures ();
+
+		if (session && current_bbt_points) {
+			draw_measures ();
+		}
+
+	} else {
+
+		if (session && current_bbt_points) {
+			Glib::signal_idle().connect (mem_fun (*this, &Editor::lazy_hide_and_draw_measures));
+		} else {
+			hide_measures ();
+		}
+	}
 }
 
 void
 Editor::redisplay_tempo ()
 {	
-
-	if (session && current_bbt_points) {
-		Glib::signal_idle().connect (mem_fun (*this, &Editor::lazy_hide_and_draw_measures));
-	} else {
-		hide_measures ();
-	}
 }
 
 void
diff --git a/gtk2_ardour/utils.cc b/gtk2_ardour/utils.cc
index 887494829e..238622ea38 100644
--- a/gtk2_ardour/utils.cc
+++ b/gtk2_ardour/utils.cc
@@ -547,3 +547,35 @@ key_is_legal_for_numeric_entry (guint keyval)
 	return false;
 }
 
+ustring
+short_path (ustring path, uint32_t target_characters)
+{
+	ustring::size_type slash;
+	ustring::size_type len = path.length();
+	
+	if (len <= target_characters) {
+		return path;
+	}
+
+
+	slash = path.find_last_of ('/');
+
+	if (len - slash > target_characters) {
+		/* even the filename itself is too long, so just return it - its 
+		   the best we can do
+		*/
+		return path.substr (slash);
+	}
+	
+	uint32_t so_far = (len - slash) + 4; // allow for .../
+	uint32_t space_for = target_characters - so_far;
+	
+	if (slash < target_characters) {
+		return path;
+	}
+
+	string res = ".../";
+	res += path.substr (slash - space_for);
+
+	return res;
+}
diff --git a/gtk2_ardour/utils.h b/gtk2_ardour/utils.h
index 6d5ff0702d..d24024ffab 100644
--- a/gtk2_ardour/utils.h
+++ b/gtk2_ardour/utils.h
@@ -81,5 +81,6 @@ static std::map<std::string, Glib::RefPtr<Gdk::Pixbuf> > xpm_map;
 const char* const *get_xpm_data (std::string path);
 std::string longest (std::vector<std::string>&);
 bool key_is_legal_for_numeric_entry (guint keyval);
+Glib::ustring short_path (Glib::ustring, uint32_t target_characters);
 
 #endif /* __ardour_gtk_utils_h__ */
diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index 9f76b0f19e..bc66f0d6b0 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -1051,10 +1051,15 @@ AudioRegion::separate_by_channel (Session& session, vector<boost::shared_ptr<Aud
 			new_name += ('0' + n + 1);
 		}
 
-		/* create a copy with just one source */
+		/* create a copy with just one source. prevent if from being thought of as "whole file" even if 
+		   it covers the entire source file(s).
+		 */
 
-		boost::shared_ptr<Region> r = RegionFactory::create (srcs, _start, _length, new_name, _layer, _flags);
+		Flag f = Flag (_flags & ~WholeFile);
+
+		boost::shared_ptr<Region> r = RegionFactory::create (srcs, _start, _length, new_name, _layer, f);
 		boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion> (r);
+		cerr << "new region name is " << ar->name() << endl;
 
 		v.push_back (ar);
 		
diff --git a/libs/ardour/sndfilesource.cc b/libs/ardour/sndfilesource.cc
index 850aa6bc6c..629b3e4158 100644
--- a/libs/ardour/sndfilesource.cc
+++ b/libs/ardour/sndfilesource.cc
@@ -50,8 +50,6 @@ SndFileSource::SndFileSource (Session& s, const XMLNode& node)
 {
 	init ();
 
-	cerr << "SndFileSource @ " << _path << " channel = " << channel << endl;
-
 	if (open()) {
 		throw failed_constructor ();
 	}
diff --git a/libs/pbd/stacktrace.cc b/libs/pbd/stacktrace.cc
index a653fe3033..82a78c6fe2 100644
--- a/libs/pbd/stacktrace.cc
+++ b/libs/pbd/stacktrace.cc
@@ -39,4 +39,10 @@ PBD::stacktrace (std::ostream& out, int levels)
 	out << "stack tracing is not enabled on this platform" << std::endl;
 }
 
+void
+c_stacktrace ()
+{
+	PBD::stacktrace (cout);
+}
+
 #endif /* HAVE_EXECINFO */