The base library and GHC 6.10

[Simon Peyton-Jones]

| | - ghc sessions retaining instances (#2182), leading to build errors
| |     even in separate module hierarchies
|
| >Yes I agree this is bad, but I don't think I can fix it in time for 6.10;
| >it's a consequence of an ill-made but fairly deeply wired in design choice.
|
| Just knowing whether you actually hope to do something about it,
| or whether it is so deeply ingrained that it can't be fixed, would help.

Oh yes, it can definitely be fixed, and I fully intend to fix it.  It just needs a little uninterrupted thought.

Simon