<item> Two new functions exported from <tt/ST/ (and <tt/LazyST/):
<tt/unsafeIOToST/ and <tt/stToIO/.
+<item> The <tt/+RTS -H<size>/ option is reinstated. Now it
+means "use about this much memory" (see Section <ref
+id="rts-options-gc" name="RTS options to control the garbage
+collector">). This option was added mainly so that 4.02 GC times look
+good compared to 3.02 :-).
+
+<item> <tt/finalise/ and <tt/mkWeakNoFinaliser/ operations added to
+<tt/Weak/ library.
+
+<item> Ticky-ticky profiling works again (cost-centre profiling is
+still broken).
+
</itemize>