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 a flaw in the way that it handles malformed HTML data. An attacker exploiting this flaw would need to be able to communicate with a vulnerable GAIM user. Upon successful exploitation, the Gaim client would stop responding. There is a second issue with this version of Gaim that is similar to the first. Specifically, downloaded files which include bracket characters like '(' or ')' will cause the client to crash.
Update to Gaim 1.1.4 or higher.