Jan Otto <asche(at)me(dot)com> writes:
> ERROR: could not read directory "pg_tblspc/16464": Invalid argument
> STATEMENT: DROP TABLESPACE testspace;
Hmm ... can't reproduce this here, not even on OSX. From the version
number I suspect you are using unreleased Snow Leopard. I'd venture
it's a newly-introduced kernel bug and you need to talk to Apple about
it.
regards, tom lane