403 error in viewing HTML document in briefcase using IceDove only

[maxxer]

Hi.

I have an account which cannot see correctly zimbra created html documents in briefcase.

When trying to open one of them, a 403 permission denied error shows up from jetty.
The strange thing is that this happens only from one pc, equiped with Debian Sid and IceDove 3.5.5.

I tried on different other machines/browsers, and always worked (though being REALLY low on loading, something like 2 minutes or so for a small html).

Only on the above one it doesn't work. I tried clearing the cache but no success.

The strange thing I noticed is that while the url is something like http://server/home/username/.... the 403 error says
403 permission denied to access /service/home/username/....

Don't know if it could mean something.
Thanks