FATAL: Socket command type A unknown

I'm having a wierd problem with pg 7.3.3

PostgreSQL 7.3.3 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.2
20020903 (Red Hat Linux 8.0 3.2-7)

I have a bunch of inserts being done by JDBC. One of them if causing a
problem.

LOG: query: INSERT INTO mailtextlog (mlid,tlog,cdate)
VALUES(99999933,'Sent via localhost','2003-08-27 11:07:53.701');
LOG: query: INSERT INTO mailtextlog (mlid,tlog,cdate)
VALUES(99999934,'While talking to mx1.lix.aon.at [195.3.86.141]: uAKcXMobT3
ERROR: parser: unterminated quoted string at or near "'While talking to
mx1.lix.aon.at [195.3.86.141]: uAKcXMobT3" at character 59
FATAL: Socket command type A unknown

Obviously the pg log is not showing the end of the instert I'm sending
via jdbc. I'm not sure what the string is supposed to be because it is
dynamically generated, but it should have been something like the line
above it.