diff --git a/general-info/release-20b.txt b/general-info/release-20b.txt
index 4abe3d26bcc38ea08eb9dc541c4286bc72a603c5..74506339811b38e493d1fb642b61b896245288ab 100644
--- a/general-info/release-20b.txt
+++ b/general-info/release-20b.txt
@@ -199,6 +199,9 @@ New in this release:
       operation exception.)
     - For SSE2 builds, = no longer signals an error if one operand is NaN.  This
       matches what happens for x87.
+    - For SSE2 builds, SIGCONTEXT-FLOAT-REGISTER returned the wrong
+      value for single-floats.  Easily noticead when tracing a
+      function with single-float arguments.
 
   * Trac Tickets:
     #33: get-dispatch-macro-character doesn't signal errors in