Can't restore session - problem with save("file",all)

I've been trying to save my sessions with save("file",all), but
the result will not load without errors.  I've tested this back
to 5.13.0 with clisp and sbcl.

when I do the load with sbcl I get:

	 in: LAMBDA NIL
	;     (SB-KERNEL:%PUTHASH #:G2266 #:G2267 #:G2269)
	;
	; caught WARNING:
	;   Asserted type HASH-TABLE conflicts with derived type
	;   (VALUES (SIMPLE-ARRAY CHARACTER (1)) &OPTIONAL).
	;   See also:
	;     The SBCL Manual, Node "Handling of Types"
	;
	; compilation unit aborted
	;   caught 1 fatal ERROR condition
	;   caught 1 WARNING condition

I commented out bits of the session file until I could reproducibly turn the
error on and off.  The offending lines seem to be the following (in common
code located about 23 lines up from the bottom of the file):

<lines above deleted>

                              (MDEFPROP $NSET (NIL $VERSION 1.21) $PROPS)
                              (ADD2LNC '$NSET $PROPS)
                              (DEFPROP ${ %{ VERB)
                              (DEFPROP ${ "{" OP)
Here  ->>              (SETF (GETHASH *OPR-TABLE* "{") ${)
                              (ADD2LNC '"{" $PROPS)
                              (MDEFPROP ${
                                        (LAMBDA) ((MLIST) ((MLIST) $L))
                                        (($BUILDQ) ((MLIST) $L) (($SET) 
(($SPLICE) $L))))
                                         MMACRO)
                              (ADD2LNC '((${) ((MLIST) $L)) $MACROS)
                              (MDEFPROP ${ T MLEXPRP)
                              (DEFPROP %{ ${ NOUN)
                              (DEFPROP $} "}" OP)
And Here ->>        (SETF (GETHASH *OPR-TABLE* "}") $})
                              (ADD2LNC '"}" $PROPS)

The above code appears in all session files.  Saving an empty session (i.e.
using save("file",all) from %I1) will also produce the error when the file
is loaded in a new session.

Beyond that my knowledge of lisp syntax is pretty much limited to the 
comment
character, so any suggestions would be greatly appreciated.

Thanks,

Brad Hare