blender locked in object mode- circle select -please help

Hi all.
i am a blender newbie messing around. Now i find myself locked in object mode with the cursor in circle select- unable todo anything but select objects. TAB does not work, x does not work I cannot save using control-w . I can multitask to other programs.
What is wrong? Did i stumble into a bug or did something else lock up blender?

os x 10.8.5 -blender 2.68


Click the right mouse button. Most times when Blender is waiting for input from you and you don’t know it the Esc or return key should abort or accept. and allow you to move on.

Tanx “esc” solved it :o