That message appeared each time after I restarted my MacBook Pro. It looks like a flag was written somewhere that this message should be displayed. While it takes a simple click to get rid of the message, I wanted to get rid of it once and forever. After a small search in Terminal I found how to fix it:
- Open Terminal (use Spotlight to find it)
- Type sudo rm /var/db/PanicReporter/current.panic
That's all. You can now reboot without errors.