What happened with bug #2527?

I seem to be being bitten by the same bug as #2527 which was reported three
years ago.

http://archives.postgresql.org/pgsql-bugs/2006-07/msg00056.php

I can't find any record of it having been addressed.

The bug was filed under Postrges 8.1.1; I'm on 8.3.7 on Ubuntu.

The error when 07 starts with an '

x=# select to_tsquery('foo & ''07 & bar');
ERROR:  syntax error in tsquery: "foo & '07 & bar"

Just plain 07 works okay:

x=# select to_tsquery('foo & 07 & bar');
      to_tsquery
----------------------
 'foo' & '07' & 'bar'
(1 row)

Is there a bug, or am I misunderstanding something?

Thanks