[Haskell-cafe] Why are new releases of libraries required for every GHC release?

[DavidA]

Some recent comments suggested that every time there is a new GHC release, 
there needs to be a new wxHaskell release (or insert name of other library 
here) to work with it. This seems to be true even for minor upgrades, like 
6.4.1 -> 6.4.2.

Why is this? Does GHC break binary compatibility at every release? Is this 
avoidable?

This makes using Haskell unnecessarily hard compared to other platforms.