Closing the game on linux doesn't close the process?

After a day of development I’ve noticed the computer got horribly horribly slow, and eclipse crashed twice on me. I automatically thought it’s because of the super slow hardware my computer has(core i3 530) but at the end of the day I’ve ran ‘task manager’ and there were like 100\ instances\ of\ the\ game\ running,\ each\ eating22,5MB memory and 22-50% CPU…

So I’ve noticed the application instance doesn’t close properly, is this normal? I run with ctrl+F11 and so far the game exits exactly the same way HelloWorld does.

EDIT:
If you’re wondering, cocos2d-tests behaves the same way. Is there any way to close it properly?

Could you just add it to the bug list please?