iPhone Jailbreak 101: What Are Those Swirly Black Badges on Mail, Phone, iPod?
Confession: Jeremy can't believe we're posting this, but after a bunch of forum questions, email queries, and a mini Twitter 'splosion, we figured we'd put this up as a public service message to the Jailbreak community.
First: don't panic.
Second: those strange little black icon badges that have suddenly popped up on your Phone, Email, iPod, and perhaps other apps? Yeah, that's because you installed Backgrounder, and that's how Backgrounder shows you which applications, built-in or user-enabled, are currently running background tasks (multitasking).