ugliest application logs ever?

All,

Ah, long time - no post! :-)

I wanted to turn this into a formal contest but figured I'd poll the
list first: what are the ugliest, most useless application logs that
you've seen? Logs that defy log analysis, that are full of numeric
codes not explained anywhere? Logs that don't say what they mean (and
vice versa)? Logs that omit the most critical piece of info?

Here is my example:

|22:22:32|BTC| 7|000|DDIC        |    |R49|Communication error, CPIC
return code 020, <application> return code 456

Why it sux: numeric codes (twice), ambiguous language, no sense of
priority, etc.

More?

Best,
-- 
Anton Chuvakin, Ph.D., GCIA, GCIH, GCFA
      http://www.chuvakin.org
  http://chuvakin.blogspot.com
    http://www.info-secure.org