=== modified file 'mixxx/src/library/itunes/itunesfeature.cpp'
--- mixxx/src/library/itunes/itunesfeature.cpp	2011-10-14 00:24:59 +0000
+++ mixxx/src/library/itunes/itunesfeature.cpp	2011-10-14 05:37:21 +0000
@@ -62,6 +62,8 @@
 }
 
 ITunesFeature::~ITunesFeature() {
+    m_future.cancel();
+    m_future.waitForFinished();
     delete m_pITunesTrackModel;
     delete m_pITunesPlaylistModel;
 }

=== modified file 'mixxx/src/library/rhythmbox/rhythmboxfeature.cpp'
--- mixxx/src/library/rhythmbox/rhythmboxfeature.cpp	2011-10-14 00:24:59 +0000
+++ mixxx/src/library/rhythmbox/rhythmboxfeature.cpp	2011-10-14 05:36:44 +0000
@@ -54,6 +54,8 @@
 }
 
 RhythmboxFeature::~RhythmboxFeature() {
+    m_track_future.cancel();
+    m_track_future.waitForFinished();
     delete m_pRhythmboxTrackModel;
     delete m_pRhythmboxPlaylistModel;
 }

=== modified file 'mixxx/src/library/traktor/traktorfeature.cpp'
--- mixxx/src/library/traktor/traktorfeature.cpp	2011-10-14 00:24:59 +0000
+++ mixxx/src/library/traktor/traktorfeature.cpp	2011-10-14 05:37:54 +0000
@@ -59,6 +59,8 @@
 }
 
 TraktorFeature::~TraktorFeature() {
+    m_future.cancel();
+    m_future.waitForFinished();
     if(m_pTraktorTableModel)
         delete m_pTraktorTableModel;
     if(m_pTraktorPlaylistModel)