Tested on 3.8.0, 3.8.1 + MySQL on Debian 6.0.7
I pulled this attached scaled image from the ofVCard table. When it is pushed to clients during presence updates, the clients disconnect with 'Input/output error' or various incarnations of the same idea. 100% reproducable at-will in my environment. Disconnects (at least) Trillian, Pidgin, and Psi. While the clients are the ones sending the TCP RST, I can't tell if the problem actually begins within the server or not. Debug logs on Trillian and Pidgin both show no issues until the disconnect. I was unsuccessfull in forcing the clients to conenct unencrypted and unsuccessfull in decrypting the TLS stream (wireshark hatres me - decrypt_ssl3_record: no decoder available), so I don't know what is actually being sent to the client.
I have attached both the original image and the auto-scaled one.