When I first got my macbook pro I installed windows 7 via boot camp.
A couple months later I wanted to install ubuntu and have a triple boot. I followed this tutorial: triple-boot
After I finished following the steps in the tutorial windows would not boot (everything else worked fine), so I opened up disk utility and decided to remove the windows partition (because it was setup with boot camp). Doing this only created a huge free space where my windows partition used to be.
Now anything I try to do in disk utility displays the error: "Mediakit reports no such partition", even when trying to split up my mac hd.
Does anyone have any idea how to fix this?