It's not a bug, it's a feature!
I remember seeing an umpteenth Xerox generation of the Jargon Dictionary, which had an entry for "feecher" (as compared to "feature").
I seem to have thrown that out at some point, thinking the online version had it all covered. But now I can only find one link :(
Update: That link is no more, I found a PDF here, search for "feecher")
[feecher, feechur]
n. An unforeseen, arbitrary, or capricious attribute, which, once documented, is spelled feature (q.v.).
-QM
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Quantum Mechanics: The dreams stuff is made of