[imp] Problem with Viewing Attachments

[test at dkravitz.com]

Everything is working fine, but if the attachments to an email are over 100kb, I
cannot view them or download them via IMP.

For example, if there are multiple attachments, the first few work fine if
they are under 100kb combined, but everything after the 100kb mark has
problems.

If I access the mailbox store from an email client, everything works fine.

I am using IMP 3.2.6 and PHP 4.3.8.

Thank you for any suggestions you can offer.