stream_getlen error

[Len Conrad]

On my BIND8 / NT server, I've got this "stream_getlen" error sprinkled 
randomly or sometimes clustered:

06-Jun-2000 02:34:53.000 stream_getlen([209.67.42.160].3500): Unknown error
06-Jun-2000 02:34:53.000 stream_getlen([209.67.42.160].3501): Unknown error
06-Jun-2000 02:34:53.000 stream_getlen([209.67.42.160].3502): Unknown error

The [ip address] is not always the same.

BIND otherwise else seems to work ok.  Any ideas?

Len