IMP2.2 broken IE attachment downloads

[Chris Russel]

There was a thread a while back about 2.3 having a
"workaround_broken_ie_download" setting.  Is there such a thing for 2.2?
I have users reporting the exact same problem downloading attachments
(with IE; Netscape is fine of course).  We're running 2.2.3.   

The problem report is something like:
---
Internet Explorer cannot download from view ('21',0);:
Internet Explorer was not able able to open this internet site.  The
requested site is either unavailable or cannot be found.  Please try again
later.
---

Chris