+--- libs/defaults.h 2011-08-15 18:25:40.000000000 +0200
++++ libs/defaults.h 2012-04-12 21:13:47.000000000 +0200
+@@ -25,7 +25,7 @@
+ /* The "extended" buttons do not provide the full functionality because X has
+ * no bit mask value for them. Things like dragging windows don't work with
+ * them. */
+-#define NUMBER_OF_EXTENDED_MOUSE_BUTTONS 9
++#define NUMBER_OF_EXTENDED_MOUSE_BUTTONS 15
+ #if NUMBER_OF_EXTENDED_MOUSE_BUTTONS > 31
+ #error No more than 31 mouse buttons can be supported on 32 bit platforms
+ #endif