Asa's suggestion is, naturally, barking mad from a desktop interface point of view.
But from a web services point of view, it is already utterly standard.
Where's the Help|About dialog with version number in, say, Google Docs?
What Asa is trying to do is make the software update process for browsers the same as the software update process for web services. When you report an error, you would just say "it is in the current version" - because it must be, because you're (always) running the current version.
You can argue whether this is a good or bad thing. But I'm sure you agree that desktop and web applications are increasingly blurring together, and stealing each others benefits. Not having to worry about updates is, for most users, a benefit.
But I think it would be better if we added version numbers to web services, rather than took them away from desktop applications...