diff --git a/timeline/src/OSC_Thread.C b/timeline/src/OSC_Thread.C
index f252810..be6e074 100644
--- a/timeline/src/OSC_Thread.C
+++ b/timeline/src/OSC_Thread.C
@@ -51,11 +51,7 @@ OSC_Thread::process ( void )
     {
         usleep( 100 * 1000 );
         
-        lock();
-
         timeline->process_osc();
-
-        unlock();
     }
 }
 
diff --git a/timeline/src/Timeline.C b/timeline/src/Timeline.C
index 8a8bf79..1a4f7d7 100644
--- a/timeline/src/Timeline.C
+++ b/timeline/src/Timeline.C
@@ -1479,16 +1479,16 @@ Timeline::add_track ( Track *track )
 {
     DMESSAGE( "added new track to the timeline" );
 
-    engine->lock();
+    wrlock();
 
-    osc_thread->lock();
+    engine->lock();
 
     tracks->add( track );
 
-    osc_thread->unlock();
-
     engine->unlock();
 
+    unlock();
+
     /* FIXME: why is this necessary? doesn't the above add do DAMAGE_CHILD? */
     redraw();
 
@@ -1500,17 +1500,17 @@ Timeline::remove_track ( Track *track )
 {
     DMESSAGE( "removed track from the timeline" );
 
-    engine->lock();
+    wrlock();
 
-    osc_thread->lock();
+    engine->lock();
 
     /* FIXME: what to do about track contents? */
     tracks->remove( track );
 
-    osc_thread->unlock();
-
     engine->unlock();
 
+    unlock();
+
     /* FIXME: why is this necessary? doesn't the above add do DAMAGE_CHILD? */
     redraw();
 }
@@ -1708,6 +1708,8 @@ Timeline::process_osc ( void )
 {
     THREAD_ASSERT( OSC );
 
+    rdlock();
+
     /* reconnect OSC signals */
     for ( int i = tracks->children(); i-- ; )
     {
@@ -1719,5 +1721,7 @@ Timeline::process_osc ( void )
             c->process_osc();
         }
     }
+
+    unlock();
 }
 
diff --git a/timeline/src/Track.C b/timeline/src/Track.C
index a53e9b8..1a42171 100644
--- a/timeline/src/Track.C
+++ b/timeline/src/Track.C
@@ -582,16 +582,16 @@ Track::remove ( Control_Sequence *t )
     if ( ! control )
         return;
 
-    engine->lock();
+    timeline->wrlock();
 
-    timeline->osc_thread->lock();
+    engine->lock();
 
     control->remove( t );
 
-    timeline->osc_thread->unlock();
-
     engine->unlock();
 
+    timeline->unlock();
+
     resize();
 }