Pentax users at the Chinese Xitek forum often write that the SDM as something that is all evil (since it is so infamous for premature failure). See the heading of this recent thread, for example:-
http://forum.xitek.com/showthread.php?threadid=831693
(Google translated English Page Here)
The really interesting thing is that the first replier simply writes "Saddam" for the SDM! Wow, good imagination and creativity which is yet very exact, for both the representation and meaning, pronunciation and the spelling! :-o ;-D
Nice done, guy! :-)
Nevertheless, if you're new to Pentax and do not know much about how evil the Pentax SDM (and Pentax herself as well on this *real* issue) could be, just search yourself for something like this at my blog, for example.