error during vacuum

INFO:  analyzing "pg_catalog.pg_type"
INFO:  "pg_type": 5731 pages, 265 rows sampled, 265 estimated total rows
INFO:  vacuuming "pg_catalog.pg_attribute"
ERROR:  failed to re-find parent key in "pg_attribute_relid_attnam_index"  

I get this error when I run Vacuum verbose analyze, any ideas?  I 
recently re-created a number of tables and indexes b/c we needed to 
change to bigints.


Thanks
Michael