An error message that explains a lot
A while ago, my Flash player crashed Internet Explorer 7.
Yeah, I know; you're saying "Use Firefox instead of IE7, dummy."
Anyway, the Windows Error Reporting Service dutifully sent the error message to Microsoft; I expected some message to come back from the Mothership about upgrading my Flash player. Instead, it came back with the following report:

No, the information wasn't helpful, but the first paragraph of the message sure does explain a lot.