Bug: problem with -caf-all

Hello,

I'm trying to use the -caf-all flag with ghc-6.02, in conjunction with -O
(which means going via C...)

But in a few modules of a large program, the .hc files contain duplicate
definitions of "MODsat_CAF_cc_ccs" (where MOD = a particular module)

I can't see an obvious pattern to the number of duplications. All the
affected modules use MPCs heavily. It doesn't look like the duplications
are 1-1 with the instance decls. It only happens on a few modules out
of many which also use classes heavily.

NB I hand-patched the .hc files by hand, and in the results, not much of
the dictionary/caf info showed up! Should -auto-dicts work?

Any ideas?

Thanks

Paul