[imp] Message is not displayed

[lst_hoe at kwsoft.de]

Hello

i have a problem that one message in my mailbox is not visible with IMP. In fact
the browser show a blank page (Mozilla 1.2, IE 5.5) or report "Dokument
contained no data" (Netscape 4.8). I have searched all the logfiles (Apache,
PHP) and found no error message at all. I tried with loglevel set to "DEBUG" in
HORDE but still no log-message.
The message is nothing special in size or format and thousand of messages worked
well before.

Any hints where i can dig further??

Facts :

Horde 2.1
IMP 3.1
Apache 1.3.27
PHP 4.3.0-RC3

Thanxs for any help 

Regards

Andreas