"Plaintext data for protocol HTTP was received" messages in weblogic logs.

Hi,            We upgraded WLProxy plugin from 1.0 to 1.1 and Weblogic from 10.3.1 to 10.3.5. We are seeing following warning message in logs. Any idea what is causing this?

<Oct 22, 2012 7:03:28 AM EDT> <Warning> <Security> <BEA-090475> <Plaintext data for protocol HTTP was received from peer xxxxx.xxx.com - xx.xxx.xx.xx instead of an SSL handshake.>

Thanks in advance.

Thanks & Regards,
AswinK