Entire account shared, but not fully accessible with non-English locale

[dsent]

Hi.

I've switched to Zimbra from Exchange. One of useful Exchange features is access to others' mailboxes with one's credentials. I've tried to do the same with Zimbra through sharing root folder of the account, like suggested.
Root folder of the shared account mounts properly. However, I can't see contents of root folder's first level children (/Inbox, /Sent, /Junk etc.). I can see number of items there in the tooltip, I can open second level children and further (e.g. /Inbox/Archive, /Inbox/Archive/2008).

This happens only if I'm using localized Russian version of Web client. Switching to U.S. English fixes everything, but it's not acceptable as company-wide solution...

Could anyone give me a helping hand in this?
Thanks in advance!