walreceiver getting bad data?

I'm getting an error like this in the log a couple times a day on on my hot
standby server. Any suggestions?

23964 2011-01-04 05:23:00 EST [47]LOG: invalid record length at
6E53/46E8A010
23535 2011-01-04 05:23:00 EST [2]FATAL: terminating walreceiver process
due to administrator command
cp: cannot stat `/data23/wal_sync/0000000100006E5300000046': No such file or
directory
23964 2011-01-04 05:23:00 EST [48]LOG: invalid record length at
6E53/46E8A010
cp: cannot stat `/data23/wal_sync/0000000100006E5300000046': No such file or
directory
2486 2011-01-04 05:23:00 EST [1]LOG: streaming replication successfully
connected to primary

Thanks,
Gordon
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