I would like to give this old thread a litte push cause i keep running into problems with digital clipping in fx chains. It would also be a nice addition to the editor.
For example, i have a (very) clean profile, no clipping audible at all. Input LED stays green all the time, profile output is set to 0 db, profiler output is set to -10 db. To get a little volume boost here and there i added a "Pure Booster" with boost set to +3 db to the X-slot (post stack that is). When i turn on the Pure Booster i get audible clipping. For a simple signal chain like this you get along somehow but when you use many fx its not a simple task to keep levels right.
Metering would really help to solve such problems.