=== modified file 'mixxx/src/widget/wlibrarysidebar.cpp'
--- mixxx/src/widget/wlibrarysidebar.cpp	2012-12-12 17:23:33 +0000
+++ mixxx/src/widget/wlibrarysidebar.cpp	2013-05-21 18:47:10 +0000
@@ -16,6 +16,9 @@
     setDropIndicatorShown(true);
     setAcceptDrops(true);
     setAutoScroll(true);
+    header()->setStretchLastSection(false);
+    header()->setResizeMode(QHeaderView::ResizeToContents);
+    header()->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
 }
 
 WLibrarySidebar::~WLibrarySidebar() {