Personally I would have preferred bytea(16) but for some reason the php drivers seem to jut drop NULL there when I try to store raw binary md5 hashes. So for now I just declared it bytea with no length specification and store the hex encoded hash.
If anyone knows how to get Pear::DB to store binary data in a bytea column, by all means.
Did you try using pg_escape_bytea()?
Joe
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