My N900 is running a bit lumpy since yesterday:

• Media Player won't play any files ("file format not supported")
• Camera and Flashlight won't start ("used by another program")
• Volume button does nothing
• Pulseaudio has cpu usage of 30%, Hildon status menu 50% - both go back to normal when i disable the volume slider in the status menu

These malfunctions occur since a reboot after

• adding the repository for the Maemo SDK and installing gcc and pkg-config
• installing orecchiette 0.3
• installing media-im-status-updater 0.4

I have no idea how to investigate this issue and much less how to fix it. Any idea or all-in-one-click solution?