[imp] download all attachments as zip

[Joseph Malone]

Quoting Jan Schneider <jan at horde.org>:

> Zitat von Joseph Malone <josephmalone at higlum.com>:
>
>> Quoting Jan Schneider <jan at horde.org>:
>>
>>> Zitat von Joseph Malone <josephmalone at higlum.com>:
>>>
>>>> Using HEAD, we're having some problems with the "download all
>>>> attachments" link.
>>>>
>>>> To reproduce the problem, you forward a message, attach something to
>>>> it, and send it.
>>>>
>>>> In I.E. you get a "Cannot copy file: Cannot read from the source file
>>>> or disk" if you try to save all the attachments as a zip file.
>>>>
>>>> Is anyone else getting this error?  Note that it works fine in firefox