Linux Mint Olivia x64
Short description of error
That is not error itself, but a little bug maybe.
It was possible in 2.67 to quickly perform some operations, like scaling vertexes to zero, by quickly press S -> 0 -> Enter. In fact, it took less then half a second on keyboard. It could be pressed so fast, that left hand is still pressing (did not release) the S button, and right hand is already pressing the 0 on numpad. In the latest versions, blender ignores pressing 0 while the S is still pressed. It disturbs and makes user to concentrate not on working, but on pressing and releasing buttons :)
Exact steps for others to reproduce the error
See the description.