Changing it back didn't work 
Like I said, the issue is the
'The processing before saving a message converts this to
'But the processing for the smiley to check both options converts it to
'Because they don't match, it breaks.
If you set the code for the smiley back to
:'( and in addition you add a smiley, with the same gif, with the code
:'( and set it to hidden, then it should work.