While I agree that Launcher would likely work around this problem (and I'll mess with it when I get a chance), I still think that these apps should work correctly without it, and that this is a bug worth reporting. I can envision times when I really do want all four of these apps running, or at least simultaneously available.

I think we need to locate the source of this problem, whether it's poor userland-app coding or a Hijack bug. I have a hunch it's a symptom of a simple (but easy to overlook) problem which is also responsible for many of the other troubles that we've been seeing in userland apps (such as the amazing disappearing app problem, and the slow app response problem, and they keystrokes-getting-lost problem).