GS2: triggeraction(), bug or am I doing something wrong?

[Fry]

I don't know why it won't work, but I am not exactly sure whether it should work and whether it's a bug:

function onActionfoo() {
  player.chat = "works.., " @ params[0];
}
function onActionserverside() {
  player.chat = "onActionServerside";
  triggeraction(player.x+1.5, player.y+2, "foo", "test");
}

//#CLIENTSIDE
if (weaponfired)
  triggeraction 0,0,serverside,#w;

in a weapon.

the serverside trigger arrives, the "foo" trigger doesn't. Neither on the serverside, nor on the clientside.
It also doesn't work when I replace "player" with some other player that also has the weapon.