instance overlap in 6.6 candidate

[Rene de Visser]

"Simon Peyton-Jones" <simonpj at microsoft.com> schrieb im Newsbeitrag |
| This gives the user possibility to redefine a certain part of the
| library instance.
| Is not  ghc-6.4.1  better at this point?

Perhaps.  That's what I'd like feedback about.  What do others think?
...
Simon

What are the disadvantages of compiling every library 
with -fallow-overlapping-instances?

Rene.