My N900 seems to access my imap accounts just fine for all of my email accounts except for one...

I noticed that the one difference in this account is that the inbox is called "INBOX" instead of "Inbox", like the others. When I try to click on the INBOX button it does nothing at all. Doesn't load the list or even try to. Do you think this a case-sensitive issue, or something else? I see no way to rename the inbox on my device or through the provider (Rackspace).

Any ideas? Thanks