Sometimes, specially when experimenting with stuff on your HP Mini MacBook Pro 311, you get a KP (kernel panic) during boot.
While you can always just opt to force shutdown the Mini 311 and restart again in verbose mode or safe mode, it causes issues with the Mac OS X file system, i.e. orphaned files. Permissions Repair via Onyx or Disk Utility can easily solve the problem and regularly running this maintenance activity can save you from a big headache.
