Bush's new space proposal basically pulls the plug on this stupid multi-national feel-good project anyway, so I don't care if they abandon ship. It's doomed in any event.
Stick it in a bathtub, and see where the bubbles come out.
Of course, if they allow very much more leakage, then there will be no bubbles coming out. They will have to look for water spraying in. (Lots of assumptions regarding the tub and its environs.)
Good point about the reliability of the instrumentation. Perhaps they are seeing the result of a corroding electrical connection. How much of this stuff was purchased from the lowest bidder ( our system ) or manufactured by slave ( socialist ) labor?