Data.Array.MArray "lost" bounds

[Andreas Marth]

With ghc-6.6 there is a change in module Data.Array.MArray which now
includes a function
getBounds :: (MArray a e m, Ix i) => a i e -> m (i,i) but it misses the good
old
bounds [which had type bounds :: (HasBounds a, Ix i) => aie -> (i,i)].
What is the rational behind this change?
Are MArrays now able to change there size?

Thanks for any eplanations,
Andreas