I've just published a few last-minute changes to draft #4 from Lassi.  I'm going to wait for more to accumulate before I declare another draft.

Here is the commit summary:
  • Fix typos in procedure names
  • Fix dropped "are"
  • Clarify fixnums -> integers
  • Clarify section title
  • Reverse case-fold direction to match Unicode
  • Add test case for case-fold direction