rsync - Dec 2001 - bit length overflow?

I'm getting messages that look like this:
   bit length overflow
   code 6 bits 6->7
in rsync-2.5.1pre3  (and in 2.4.7pre4)

Is that an error, or a piece of verbose logging?  the return code was zero,
which makes me think that everything's okay. 

--
Daniel Sadinoff,  Goldman, Sachs & Co  
212-357-9608   daniel.sadinoff@gs.com