heap errors - should I be worried?

Hello,

yesterday I took our database down and started in single user mode.
After reindexing of three tables I thought a vacuum would be a good idea.

backend> VACUUM FULL VERBOSE ANALYZE
WARNING:  Index pg_statistic_relid_att_index: NUMBER OF INDEX' TUPLES
(163) IS NOT THE SAME AS HEAP' (345).
         Recreate the index.
WARNING:  Index pg_statistic_relid_att_index: NUMBER OF INDEX' TUPLES
(5) IS NOT THE SAME AS HEAP' (345).
         Recreate the index.
WARNING:  Index pg_toast_16408_index: NUMBER OF INDEX' TUPLES (2) IS NOT
THE SAME AS HEAP' (7).
         Recreate the index.

Should these errors worry me? What do they mean? IS there anything I
need to do / should have done?

TIA

/Ulrich