diff -up cups-1.4b2-svn8404/cups/ipp.c.str3197 cups-1.4b2-svn8404/cups/ipp.c
--- cups-1.4b2-svn8404/cups/ipp.c.str3197	2009-02-17 17:45:27.000000000 +0000
+++ cups-1.4b2-svn8404/cups/ipp.c	2009-05-14 16:08:22.329366931 +0100
@@ -1431,7 +1431,8 @@ ippReadIO(void       *src,		/* I - Data 
 	    case IPP_TAG_NOTSETTABLE :
 	    case IPP_TAG_DELETEATTR :
 	    case IPP_TAG_ADMINDEFINE :
-	        if (attr->value_tag == IPP_TAG_NOVALUE)
+	        if (attr->value_tag == IPP_TAG_NOVALUE ||
+		    attr->value_tag == IPP_TAG_DELETEATTR)
 		{
 		  if (n == 0)
 		    break;