create operator class problem

I wanted to play with ltree, but I'm having trouble running ltree.sql.
Everything in ltree.sql seems to work, except for the CREATE OPERATOR
CLASS statements, which error out like:

ERROR:  syntax error at or near "OPERATOR10"
LINE 3: OPERATOR10<@ (_ltree, ltree)RECHECK ,

...which is generated from:

CREATE OPERATOR CLASS gist__ltree_ops
    DEFAULT FOR TYPE _ltree USING gist AS
    OPERATOR    10  <@ (_ltree, ltree)  RECHECK ,
    OPERATOR    11  @> (ltree, _ltree)  RECHECK ,
    OPERATOR    12  ~ (_ltree, lquery)  RECHECK ,
    OPERATOR    13  ~ (lquery, _ltree)  RECHECK ,
    OPERATOR    14  @ (_ltree, ltxtquery)   RECHECK ,
    OPERATOR    15  @ (ltxtquery, _ltree)   RECHECK ,
    OPERATOR    16  ? (_ltree, _lquery) RECHECK ,
    OPERATOR    17  ? (_lquery, _ltree) RECHECK ,
    FUNCTION    1   _ltree_consistent (internal, internal, int2),
    FUNCTION    2   _ltree_union (internal, internal),
    FUNCTION    3   _ltree_compress (internal),
    FUNCTION    4   ltree_decompress (internal),
    FUNCTION    5   _ltree_penalty (internal, internal, internal),
    FUNCTION    6   _ltree_picksplit (internal, internal),
    FUNCTION    7   _ltree_same (internal, internal, internal),
    STORAGE     ltree_gist;

I'm running PostgreSQL 8.2.1.

I also gave the 'seg' contrib module a whirl, and it also errors out on
the CREATE OPERATOR CLASS statement.

--
Ron Peterson
https://www.yellowbank.com/