Index: src/ops/core.ops
===================================================================
--- src/ops/core.ops	(revision 48320)
+++ src/ops/core.ops	(working copy)
@@ -1009,19 +1009,22 @@
 
 =item .PARROT_ERRORS_GLOBALS_FLAG
 
-Throw an exception if global doesn't exist.  Default: on.
+Throw an exception if a global doesn't exist. This
+flag is not used by Parrot and is deprecated.
 
 =item .PARROT_ERRORS_OVERFLOW_FLAG
 
-Throw math overflow instead of promoting to BigInt.  Default: off.
+When performing arithmetic on Integer PMCs, throw a math overflow exception
+instead of promoting to BigInt. This flag does not pertain to native integers,
+which are never promoted. Default: off.
 
 =item .PARROT_ERRORS_PARAM_COUNT_FLAG
 
-Throw exception on argument <-> param count mismatch.  Default: off.
+Throw an exception on an argument versus parameter count mismatch. Default: on.
 
 =item .PARROT_ERRORS_RESULT_COUNT_FLAG
 
-Throw exception on return <-> result count mismatch.  Default: off.
+Throw an exception on a return versus result count mismatch. Default: off.
 
 =item .PARROT_ERRORS_ALL_FLAG
 
Index: DEPRECATED.pod
===================================================================
--- DEPRECATED.pod	(revision 48449)
+++ DEPRECATED.pod	(working copy)
@@ -249,6 +249,10 @@
 
 L<https://trac.parrot.org/parrot/ticket/1655>
 
+=item errorson, errorsoff operations [eligible in 2.7]
+
+The C<.PARROT_ERRORS_GLOBAL_FLAG> flag will be eliminated. It is not used by Parrot.
+
 =back
 
 =head1 Bytecode