Infinite Force Close bug
 

Pretty self explanatory. The problem persisted through a reboot, a permissions fix, and a second reboot; uninstalling and reinstalling fixed it. I do think I know how I caused it however. With the lockscreen media controls active in winamp's options, and on the first wake up after starting music playback, there's a couple seconds where it shows the default lock screen, and then the winamp lock screen appears. I unlocked my phone within that couple seconds, and immediately after that the force closes started.