I'll need that tcpdump to have a chance of seeing why this occurs: (09:34:44) connection: Connection error on 0x7fa6445e0860 (reason: 3 description: Login verification down or unavailable) Bear in mind that it will contain your Sametime hostname and credentials (in some form). It's possible that the possibly gcc-related change in the bytes is in your credentials, but if you can see a difference outside these you can knock out those bytes with a hex editor. Otherwise you can encrypt it to me; my GPG fingerprint is 977D C032 1C98 5C7A 333A 734F 74D2 95B4 D344 FEF1.