[xmonad] Leak... somewhere... I periodically restart xmonad to recover gobs of swap space

Software: xmonad 0.11 xmobar 0.10 Xorg 1.14.1 After a while (say, a month) of normal activity, my swap space becomes almost entirely eaten up; the problem can be solved by restarting xmonad (`mod-q'). The problem could well be `xmobar' or `X' itself.