REINDEX not working for wastedspace

I am using Postgresql 9.0.1.

Using the query http://wiki.postgresql.org/wiki/Show_database_bloat, I got the following result for a table:

-[ RECORD 1 ]----+-----------------------------------------------
current_database | crm
schemaname       | public
tablename        | _attachments
tbloat           | 0.9
wastedbytes      | 0
iname            | attachments_description_type_attachmentsid_idx
ibloat           | 2.3
wastedibytes     | 5439488
-[ RECORD 2 ]----+-----------------------------------------------
current_database | crm
schemaname       | public
tablename        | _attachments
tbloat           | 0.9
wastedbytes      | 0
iname            | attachments_attachmentsid_idx
ibloat           | 0.2
wastedibytes     | 0
-[ RECORD 3 ]----+-----------------------------------------------
current_database | crm
schemaname       | public
tablename        | _attachments
tbloat           | 0.9
wastedbytes      | 0
iname            | _attachments_pkey
ibloat           | 0.2
wastedibytes     | 0

I REINDEXED  both the indexes and table, but I did not find any change in wastedspace or wastedispace.
Could you please tell me why?