[imp] Attachment problems in IE

[Ian Miller]

Horde: 2.2.7
IMP: 3.2.7
Turba: 1.2
Kronolith: 1.1
Mnemo: 1.1
Nag: 1.1
Accounts: 2.1
Forwards: 2.2
Vacation: 2.2
PHP Version: 4.3.10
Solaris 9 lastest patches
Apache 2.0.52

I upgraded my webserver and php and then attachments stopped working.
I then upgraded horde to the latest 2.0 series and the problem still exists.
I have never had problems with attachments in the past.
-Ian