--- a/src/maple/mouse.c	Sat Jan 26 03:44:22 2008 +0000
+++ b/src/maple/mouse.c	Fri Mar 28 12:32:25 2008 +0000
@@ -85,18 +85,18 @@
 void mouse_input_callback( void *mdev, uint32_t buttons, int32_t x, int32_t y )
 {
     mouse_device_t dev = (mouse_device_t)mdev;
-    dev->buttons = 0;
+    dev->buttons = 0xFF;
     if( buttons & 0x01 ) {
-	dev->buttons |= BUTTON_LEFT;
+	dev->buttons &= ~BUTTON_LEFT;
     }
     if( buttons & 0x02 ) {
-	dev->buttons |= BUTTON_MIDDLE;
+	dev->buttons &= ~BUTTON_MIDDLE;
     } 
     if( buttons & 0x04 ) {
-	dev->buttons |= BUTTON_RIGHT;
+	dev->buttons &= ~BUTTON_RIGHT;
     }
     if( buttons & 0x08 ) {
-	dev->buttons |= BUTTON_THUMB;
+	dev->buttons &= ~BUTTON_THUMB;
     }
     dev->axis[0] += x;
     dev->axis[1] += y;