[Zope] Reloading file objects?

[Peter Arvidsson]

I have file-objects containing pdf-files. When I change the object to
contain another pdf-file (with "manage_upload") I get a problem. When I
want to view the file it still shows the old file. However when I choose
save to disk I get the new object and if I take a look at its properties
(size etc...) they are for the new object. 

Does anyone know a way to get the file to show the new pdf-file when I
want to view it? 

I have tried to put <META HTTP-EQUIV="Pragma" CONTENT="no-cache"> in the
page where I have the link to the file but that doesnt affect the file
when I open it. The link I use are the path for the file as it is on the
view-tab of the object. Is there some way to get it to show the new file
when I view it and not only when I save it to disk or open it in a new
window?