--- ray/doc/notes/ReleaseNotes	2015/12/04 22:16:18	1.272
+++ ray/doc/notes/ReleaseNotes	2016/01/29 16:21:55	1.273
@@ -2064,3 +2064,9 @@ Fixed issue with vchars.mta and symbols.mta not being 
 the appropriate metafile library location, with help from Rob G.
 
 Added ability to give quoted strings to output= directive in rfluxmtx.
+
+****** COMPATIBILITY CHANGE ********
+Added ability to digest color (CIE-XYZ) input in pabopto2bsdf.
+This change alters the .sir (interpolant) format, so these files
+will need to be regenerated.  Use the new "#colorimetry: CIE-XYZ" tag
+to enable on input.