This was caused by the Linux merge.

These two lines

    {java_awt_event_KeyEvent_VK_F11, XK_F11, FALSE},
    {java_awt_event_KeyEvent_VK_F12, XK_F12, FALSE},

look like they should be right, but they aren't. For some reason, the
Stop key is XK_F11 (aka XK_L1) and the Again key is XK_F12 (aka XK_L2).

The F11 and F12 keys are

    {java_awt_event_KeyEvent_VK_F11, XK_SUNF36, FALSE},
    {java_awt_event_KeyEvent_VK_F12, XK_SUNF37, FALSE},


Strange, but true.