IOError vs. Exception vs. IOException

[Alastair Reid]

> I'm really not arguing either way, in fact I like the change, but
> perhaps we should think hard before breaking code.  I haven't heard
> anyone else comment so far on whether they like/dislike the current
> Exception interface... anyone?

Now that I appreciate that Prelude.catch and Exception.catch catch
different sets of exceptions despite having the same name and type,
I'm pretty unhappy with the interface.  I have little opinion about
the rest because I haven't used much beyond what little Hugs also
supports.

--
Alastair