Autocomplete on array index not working (osx - 4.0.3)

I cannot get autocompletion on array indizes to work, any hint why this doesnt work for me.

Example:

$opt = array();
$opt["test1"] = 'test1';
$opt["test2"] = array();
$opt['te*']

* Pressing CTRL + Space => "No Suggestion"

I'm on OSX, phpstorm version is 4.0.3, JDK 1.6.0_26