I've seen oddball behavior with POST once before: a client,
who I won't mention, had a not-so-great firewall configured
and managed by another vendor. The client was trying to post
replies to questions on a message board on their website (which
was hosted by the company I was working for at the time), but the
replies kept getting cut off at 5K. It
turns out the firewall itself was truncating the POST
requests.... So it wouldn't surprise me one bit if a badly
behaving proxy server were converting POSTs to GETs -- especially
if it were a proxy designed to cache requests (since you can more
readily cache the response to a GET than the response to a POST).
Spud Zeppelin * spud@spudzeppelin.com