added description of version changes...

diff --git a/README b/README
index 07dd86c7ed5ba325d9e5a8cab1ae41ae9049d051..2697258866836fac2f848b6b083943c0684a5715 100755 (executable)
--- a/README
+++ b/README
@@ -113,8 +113,10 @@ utilities all respond to -h.
 Change History
 
 2009.05.20 - bug fixes, v.1.4.24
- o Fixed a bug that caused incorrect UL values to be written into 
-   interop format MXF track files.  
+ o Fixed a bug that caused incorrect SubDescriptors UL values to be 
+   written into interop format MXF track files.  Note that this involved
+   a substantial reogrganization of MXF internals.  Please test thoroughly
+   in your application before using in production.
 
 2009.04.09 - SMPTE format fixes, enhancements and bug fixes, v.1.4.22
  o asdcplib now uses GNU autotools on POSIX systems to configure