ndmitchell:

HI Don

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(But of course, having Read/Show defined for UArray may well be useful, and sounds a good idea)

There's also an instance Binary for UArray. That might be useful?

Is there an instance Binary in a released library?

If in doubt, look on hackage: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/binary/0.2 -- Don