[Exim] spamd breaking EXIM

Hi List.

Below is an extract from maillog

<snip>
Jan 26 12:04:02 jp-mx-1 spamd[6416]: processing message
<CA00008018@???> for xadmin:501.
2004-01-26 12:04:04 1Al7LN-0001fQ-UF string_sprintf expansion was longer
than 8192
<snip>

Is there a way around this?

Regards,
Tom Kinghorn