[imp] problems attaching files w/ safari

[Liam Hoekenga]

This is sort of a repost of a message I sent in 11/05.  I kinda figured that the problem 
had gone away, since we have a large user base and we haven't heard people screaming that
that can't attach files using safari.

Anyhoo...

I'm having a problem using Safari to upload attachments w/ Horde 3.1.3 / IMP 4.1.3 
and Horde 3.0.12 / IMP 4.0.5 using PHP 4.4.2, 4.4.4 and 5.1.6.  (5.1.6 seems to do 
the right thing w/ HEAD).

The problems go away if I downgrade to PHP 4.3.x, or I don't configure IMP to
use VFS for attachments, but if I do use VFS (filesystem based, or sql based),
I frequently get...

    [Thu Dec 21 10:59:07 2006] [info] [client xxx.xxx.xxx.xxx] 
            Read POST information timed out
    [Thu Dec 21 10:59:07 2006] [info] [client xxx.xxx.xxx.xxx] 
            client stopped connection before rvputs completed


In my php.ini,

    file_uploads = On
    upload_tmp_dir = /var/tmp
    upload_max_filesize = 10M

and LimitRequestBody isn't set in our apache configuration, and the apache docs
say that the default for LimitRequestBody is "0" (unlimited).

Any ideas?

Liam