Good point, of course. It's not likely that many people would even have a chance of seeing this problem. No need to think the sky is falling if you already have SP2.
However, it's most definitely directly related to BlackBerry. When you write an application that relies on another (especially one handling sensitive information), you have to build in error-detection and error-handling capabilities.
The email server in question generated a memory allocation error, but it did not send parts of emails to the wrong people, BES did that.
By the way, the RIM statement that no messages escaped the BBC firewall is completely irrelevant to the rest of us. That was only the result of luck. They are posturing for when the lawsuit is filed.