Well, sort of a language issue..
The "Top of Information store" is in English regardless of which language client logs in to the mailbox fist on any "modern" flavour of Exchange. By modern I mean post Exchange 2000 SP 2. Remember that the language of the folders in the mailbox is determined by the first client that logs in.
HOWEVER many people are "discovering" that they have mailboxes which existed on (for example) Exchange 5.5, or Exchange 2000 base, and have then been upgraded/migrated through lots of other flavours of Exchange right up to (say) Exchange 2007 SP 2 Rollup 4.
So, as per my screenshot, I have "Top of Information Store" in French... when I do a PST import, we don't "see" the foreign language TOIS, we just create an English one, because it's not present. This then breaks Virtual Vault and Archive Explorer.
This isn't specific to a flavour of EV. Archive Explorer would be broken no matter what version of EV you used, and Virtual Vault in all versions / service packs that that is available.
We are working on ability to fix this up .. which should be available "soon".
Working for cloudficient.com