Win7 64 bit, ATI HD4670
Short description of error
When zooming out mesh with mouse scroll wheel, you get mesh density so tight, that selection tools fail to work.
It is very inconvenient in cases when you create lots of screen menus, and you forced to zoom out 3D scene to see it completely, but do not want to select back faces such as in wireframe mode.
Exact steps for others to reproduce the error
Border select (B) whole mesh -> every face is selected
Scroll mouse wheel to max zoom out and try to border select -> fail
When selection is in vertex/edge mode, Border select is kind of working when zoom out
But get it back to normal view and you'll see some pattern instead of the whole mesh.