The remote host is vulnerable to a Denial of Service (DoS) attack.
The remote host appears to be running Gaim, a popular open-source multi-protocol instant messenger. It is reported that this version of Gaim is prone to multiple Denial of Service (DoS) vulnerabilities that may allow an attacker to disable this client remotely. An attacker exploiting this flaw would need to be able to initiate a chat session with the Gaim client. A successful exploit would result in the Gaim client crashing.
Update to Gaim 1.1.3 or higher.