Description:
------------
In static calls $this is set. 

While in theory it might make sense to allow objects 
of the same class (or derived class) to "use" this 
feature, it's a potential pitfall and from my point 
of view it's bug.

I think if a non static method is called statically
then $this can't be any object that hasn't been
created by this or a derive class.

No other language has such a "feature" :)

If it's not a bug, then read my bugreport as 
"remove this feature". 
If it's a bug, add a runtime checking for $this is object
created by same or derived class.


Reproduce code:
---------------
Example:
Noone can really say that this is "transparen" ok:

class Foo {
        private    $hallo="I am from Foo";
        function dontCallMe() {

                return $this->hallo;
        }
}
class Bar {
        public $hallo="I am from Bar";
        function testMe() {
                return Foo::dontCallMe();
        }
}
$x=new Bar();
echo ($x->testMe()); // expected runtime error...









Expected result:
----------------
Runtime error.

Actual result:
--------------
output is: "I am from Bar"


This return the member var of Bar, what you would NEVER expect.