Date: 26 Jan 87  0155 PST
From: Don Knuth <DEK@SAIL.STANFORD.EDU>
Subject: it happened   
To:   texhax@SCORE.STANFORD.EDU  

After 14 months with no bug reports, I was getting pretty confident
that we could declare TeX to be bug-free. But Saturday night I tried
something different (for me) and guess what: There will be a version 2.1.

If you have a tendency to type a space after a hyphen or a dash,
you might not have been getting optimum line breaks, since TeX didn't
compute the correct `badness' of the line following such a break.
The incorrect badnesses tended to be masked off because they were
associated with an extra penalty; but they could give strange
behavior. I'm so sorry.

The reward for the next bug will be $40.96.