Not sure if this is the right place to post this but I think I have found a bug.
I have changed the Local setting on my server to GB.
Now when I try and download any of the PDF docs from the web / admin client interface I get page cannot be displayed.
https// domain.co.uk:7071/zimbraAdmin/help/admin/pdf/User%20Instructions%20Connector%20for%20Outlook.pd f?locid=en_GB
If I change the en_GB to en_US it works fine.
This seems to apply to all of the pdf docs.