The remote host is missing an update to gaim announced via advisory DSA 716-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20716-1

It has been discovered that certain malformed SNAC packets sent by other AIM or ICQ users can trigger an infinite loop in Gaim, a multi-protocol instant messaging client, and hence lead to a denial of service of the client. Two more denial of service conditions have been discovered in newer versions of Gaim which are fixed in the package in sid but are not present in the package in woody. For the stable distribution (woody) this problem has been fixed in version 0.58-2.5. For the unstable distribution (sid) these problems have been fixed in version 1.1.3-1. We recommend that you upgrade your gaim packages.