Changes by: Jason J. Hickey (jyh at cs.caltech.edu)
Date: 2007-05-30 14:51:16 -0700 (Wed, 30 May 2007)
Revision: 10831
Log message:

      The buffered and unbuffered I/O were getting out of sync, causing
     the problem with the "Lm_db overwriting entries."  It was actually
     corrupting them.
     
     There is probably a better solution than the double-seek, I'll look at
     it again in an hour or so.