"Cluster" means "tangle" for me

I would appreciate any advice on getting out of this strange situation.  My
table now doesn't exist, but I can't recreate it either (at least under that
name).

jeffe@kiyoko=> psql -V
psql (PostgreSQL) 7.0.0

jeffe@kiyoko=> uname -a
FreeBSD kiyoko.la.verio.net 4.0-STABLE FreeBSD 4.0-STABLE #0: Thu Apr 27
10:44:07 CDT 2000 

extracts=# create index dc_et_i on dedcolo (equip_type);
CREATE
extracts=# cluster dc_et_i on dedcolo;
ERROR:  temp_286bbc3 is an index relation
extracts=# drop index dc_et_i;
ERROR:  index "dc_et_i" nonexistent
extracts=# \d dedcolo
Did not find any relation named "dedcolo".
extracts=# vacuum verbose analyze;
(snip)
NOTICE:  mdopen: couldn't open temp_28421e0: No such file or directory
NOTICE:  RelationIdBuildRelation: smgropen(temp_28421e0): No such file or
directory
NOTICE:  --Relation temp_28421e0--
NOTICE:  mdopen: couldn't open temp_28421e0: No such file or directory
ERROR:  cannot open relation temp_28421e0
extracts=# drop table temp_28421e0;
NOTICE:  mdopen: couldn't open temp_28421e0: No such file or directory
NOTICE:  mdopen: couldn't open temp_28421e0: No such file or directory
NOTICE:  mdopen: couldn't open temp_28421e0: No such file or directory