pg_dump error on hot standy db (msg or pg_toast missing a chunk number).

Hi all,
relatively new to Postgres.  I'm on 9.0 database instance on CentOS.  I was doing a pg_dump of my replicated (hot
standby)database (b/c doing it on the master was killing other processes running against it). 

My pg_dump failed.  I was getting this error:

pg_dump: SQL command failed
pg_dump: Error message from server: ERROR:  missing chunk number 0 for toast value 2950316 in pg_toast_1733250
pg_dump: The command was: COPY schema.tablename (col1,col2,...col10) TO stdout;


doing a select * also gives me an error of:
ERROR:  missing chunk number 0 for toast value 2950316 in pg_toast_1733250

Doing a search i see that a possible reindex of the table:
REINDEX index pg_toast.pg_toast_1733250;
or REINDEX table pg_toast.pg_toast_1733250;
would help ... but being this is a hot standby database, i'm getting the message:
ERROR:  cannot execute REINDEX during recovery

Now on the master database the table is ok.  I did an analyze and it was ok.  I'm not sure how I can fix this issue,
unlessi kill the replication or redo the replication.  But by doing that, it'll take a very long time.   
Any help here would be greatly appreciated as to what my next steps would be.
Thanks.