+ The hslibs/ tree is organised in a Java-like fashion. Details in
+ the new Library guide:
+ http://www.haskell.org/ghc/docs/4.06/hslibs/book1.html
+
+ Existing programs that use the -syslib flag may need to change which
+ syslibs they include.
+
+ - Support for "foreign export dynamic".
+
+ - Clean up of concurrent I/O system; in particular, I/O is now non-blocking,
+ except (alas) on stdout/stderr for tiresome reasons.
+
+ - Some refinements to the exceptions mechanism:
+ http://www.haskell.org/ghc/docs/4.06/users_guide/release-4-06.html#exc-changes-406
+
+ - More performance tuning: compiled programs now allocate 10% less memory
+ than 4.04