I've been receiving "tx" messages across the wire with 0 inputs and 0 outputs.  Literally the payload is 10 bytes { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 }.  (Version = 1, 0 inputs, 0 outputs, LockTime = 0)

Any idea what those are all about?  It's just occasionally.  Do they have special purposes or are they just a misbehaving client?