[plt-scheme] Odd SRFI-19 problem on OS X

I wonder if it's due to typos in collects/srfi/29/bundles/srfi-19:

Index: srfi-19
===================================================================
--- srfi-19	(revision 392)
+++ srfi-19	(working copy)
@@ -16,7 +16,7 @@
  ;; long month
  (january . "January") (february . "February") (march . "March") (april . "April")
  (may . "May") (june . "June") (july . "July") (august . "August")
- (septembre . "September") (octuber . "Octuber") (november . "November") (december . "December")
+ (september . "September") (october . "Octuber") (november . "November") (december . "December")
 
  (pm . "PM") (am . "AM")
 

-- 
It is possible that with more experience and maturity Scorsese
will direct more polished, finished films ...
        -- Roger Ebert, 1969