diff --git a/general-info/release-19b.txt b/general-info/release-19b.txt
index 1f6df6423aba326488b7485e689ab162825261be..d22b4a8ea96258e6644c98c6727b8b8eec8eca7d 100644
--- a/general-info/release-19b.txt
+++ b/general-info/release-19b.txt
@@ -42,6 +42,7 @@ New in this release:
       - Lazy sxhash on symbols implemented for ppc.
       - Pretty-printer for LOOP.
       - Added some more pprinters for various forms.
+      - Callbacks supported on Mac OS X.
 
   * Numerous ANSI compliance fixes:
       - FILE-AUTHOR should signal errors appropriately.
@@ -115,6 +116,8 @@ New in this release:
         has version :wild.
       - Fixed bug with CLX on MacOS X where the WM-SIZE-HINTS were
         larger than CLX expected.  Replaced card16 with card32.
+      - Callbacks on sparc that returned double-floats were sometimes
+        causing a sigbus error.
 
   * Other changes: