title: What's the toughest bug you ever found and fixed?
body: <p>What made it hard to find?  How did you track it down?</p>
  
  <p>Not close enough to close but see also<br>
  <a href="https://stackoverflow.com/questions/175854/what-is-the-funniest-bug-youve-ever-experienced">https://stackoverflow.com/questions/175854/what-is-the-funniest-bug-youve-ever-experienced</a></p>