Is this a bug

Hello.
I run at a brand new iMac Intel 10.6.7 21.5 inch 64 bits and Blender 2.57 64 bits and made a wall (plane) with a hole look like a apple.
I made a apple with a circle and extrude to same size as the wall. But this dont work.

To show the problem I have exaggerated the size. At top View you see a tick apple
http://i1023.photobucket.com/albums/af353/Spender19/Skrmavbild2011-05-31kl201418.jpg

If you look at the side view the apple is very thinn. Same apple ??

Look at my blendfile and let me know. This have never happen before

http://www.pasteall.org/blend/6771
Thanks in advance
Karl

Not a bug.
You must have accidentally checked ‘xray’ under the object tab (under ‘display’ panel) of the big plane.
Uncheck it and you will see everything is right

Greg thanks for helping .

You solved my problem. I uncheck the x-ray button.

Thanks
Karl