Background:
I'm running Exchange 2007 SP1 with UR1 on Windows Server 2008 x64.
Problem:
The UI seems to have a few bugs in it.
I opened:

- Microsoft Exchange Management Console
- Organization Configuration
- Hub Transport
- New Remote Domain...
- Double click on new Remote Domain... (Properties window)
Weird:

- The title of the tab looks wrong
- "sender's" has a strange character in it