What does `refer' ignore?

[Michael Maxwell]

(Not sure what group(s) to post this to...)
`refer' seems to have some undocumented bugs and/or features...  The latest
one I've run across is that if a person's name happens to be the same as the
name of a month, it can't be used to pick out the reference.  I.e. if you have
the following in your roff file:
	.[
	May 1985
	.]
--refer actually bombs!  The error message is:
	Assertion failed: file refer2.c, line 84
(where is refer2.c??)  Next, I tried adding May's first name:
	.[
	Robert May 1985
	.]
--refer picked up another Robert someone who had written a paper in 1985 (as
well as May's paper, hence "too many hits").  I finally added a word from the
title, and it picked up only the correct reference (although I assume it still
ignored the word "May").

My question is, what other undocumented bugs/features does `refer' have?  What
experiences have other people had?  Work-arounds?
-- 
Mike Maxwell
Boeing Advanced Technology Center
	arpa: michaelm at boeing.com
	uucp: uw-beaver!uw-june!bcsaic!michaelm