CVS head has the same problem.  I've installed head from last Friday.  I 
verified with several other 1.8 head users that they see the same problem.

On Monday 24 February 2003 09:45 am, Yukihiro Matsumoto wrote:
> Hi,
>
> In message "Debugger Not Working"
>
>     on 03/02/25, Seth Kurtzberg <seth / cql.com> writes:
> |Using the Ruby debugger with 1.8, breakpoints are ignored.  Breakpoints
> | are working with 1.6.x.  Does anyone know what is causing this, and/or
> | whether anyone is working on fixing the problem?
>
> Which 1.8?  I remember 1.8.0-preview1 had that problem I already
> fixed.  Forget about preview1.  That was just a landmark.  Try the
> latest HEAD from CVS.
>
> 							matz.

-- 
Seth Kurtzberg
M. I. S. Corp.
480-661-1849
seth / cql.com