Re: Funny noises
Oh ..... ALSO .... When you check for leaks, look especially at the F key (you depress this one when you play the D that is giving you problems).
The F key has an adjustment (either a screw or a cork adjustment). This reaches over to the G# key. A lot of times, the G# key will lift up if the F Key adjustment is not properly holding the G# key down. Don't adjust it with too much pressure because then your F key won't close all of the way. Adjust it just enough so that it holds the G# key down to seal it and no more.
Hope that helps a little more. (Those pesky G# Keys !)