-recomp oddness.

[Alex Ferguson]

I'm not sure if this is Known Deficiency or not, but ghc-2.09 -recomp
still seems to get confused when new exported items have been added to
a module, on which the -recomp'd module depends.  It misses any (or
at least, some) name-clashes, until some later point when recompilation
is forced, only at which point is the "old" bug discovered.

Let me know if you need more details, and I can try and (re)construct
an illustrative example.

Cheers,
Alex.