The last time I tested this, it still crashed.  However, I cannot
reproduce it on Solaris SPARC because when I click on the Close button
the "..." button disappears even if it has the focus.  So I think this
really is fixed.  I will try tonight on Solaris x86 to verify but I
think this may be fixed.  Sorry for the confusion.

The behavior I observed previously when I clicked on Close was that the
"..." button, when it had focus, did not disappear but the Debugging Options
window closed.  I can't make that happen on Solaris SPARC.

Closing report.  I will reopen if I can reproduce a problem on Solaris x86.