sorry for my english
Windows 8.1 x64
Nvidia GTX 560 1GB
Broken: Blender 2.74 Hash: 000dfc0, Blender 2.74 Hash:6c15f30
Choose a piece of geometry, loop tools - circle and the selected geometry disappears, rotate the viewport, and all geometry will disappear!
Object size = 5 cm, like in real life.
Ctrl+A - Rot\Scale applied
Look at the transform panel after Loop tools - Circle