Attachments sent out of RT are being renamed

Hi there,

Our RT 3.0 is installed on Linux (MDK 9.0 - Apache 1.3 + mod_perl 1 + MySql).
I have added the “RT-Attach-Message: yes” header to on of our templates and what
I am seeing is that while attachments are indeed being sent out they
are received at the other end as AT000x.dat and not with the original file
Have I missed anything? has anyone seen this before?