[PD] Shift_L behavior of [keyname]

[hi]

Dear List,

I use pd 0.47.1 on OSX 10.8.5. I found a strange behavior of [keyname] : I if I press and hold "Shift_L" followed by an arrow key the release of "Shift_L" is printed to the console as "symbol ??" instead of "Shift_L". The same happens with pressing and holding "Alt_L" and "Meta_L". It does not happen with any other keys pressed but the arrow buttons though.

so the example output of keyname to the console looks like this:

keyname-right-outlet: symbol Shift_L
keyname-left-outlet: 1
keyname-right-outlet: symbol Down
keyname-left-outlet: 1
keyname-right-outlet: symbol Down
keyname-left-outlet: 0
keyname-right-outlet: symbol ??
keyname-left-outlet: 0

Any workarrounds?

best,

Johnny