[imp] Can't upload attachments

[Daniel A. Ramaley]

Hello. I am running Horde 3.0.7 with Imp 4.0.4 on a Linux server with 
Apache 2.0.52 and PHP 4.3.9. I can send messages just fine, except if i 
try to include an attachment. To attach a file, i scroll to the bottom 
of the compose page, hit "Browse...", select a file from the open 
dialog, then hit "Attach" back in the compose page. With Firefox (on 
either Windows or Linux), hitting Attach does nothing. With Internet 
Explorer on Windows when i hit Attach, the status bar displays "Error 
on page." (but doesn't say what the error is). Any ideas? I'm not using 
a proxy that modifies content, and javascript is enabled in the 
browsers that i've tested.

In my php.ini the following relevant values are set:
    file_uploads = On
    upload_tmp_dir = /var/tmp
    upload_max_filesize = 5M
    post_max_size = 8M
The file i'm attempting to upload is about 300kB, so it shouldn't be 
even close to hitting the limits. Based on Internet Explorer's message, 
i'm guessing it is a javascript problem. Are there any known javascript 
errors with file uploads?

------------------------------------------------------------------------
Dan Ramaley
Network Programmer/Analyst
(515) 271-4540
Dial Center 118, Drake University