What kind of crazy behaviour is this? Bug or madness?

I am experiencing very strange behaviour. Can anyone explain or confirm? Is it a bug or user madness?

To reproduce:

1.Open the help patchers for 'key' and 'jit.lcd'

2.Turn on the metro in the jit.lcd help patcher

3.Draw or focus in the jit.lcd window.

4.Press space

5.Watch the Max Window

On my system (MBP 2011,10.7.5,Max 6.1.4) I get double keypresses when I am focussed on the jit.lcd window ie I get two "You hit the space bar" messages for each keypress.

If I focus outside it, one message per press.

Thanks for trying it - let me know if I'm mad. I might do a poll or something!