Greetings and a question

[A440A@AOL.COM]

> The
>B was close to pitch, but the C was probably a FOURTH sharp! Just as a
>quick
>test (I was severely time constrained), I dropped the pitch on that string
>down to octave with the higher C, and within a few minutes it had already
>sharped by what I would guess to be at least 50 cents!
>
>Any idea what could cause such behavior?

Greetings, 
    Maybe a bridge has separated from the board.  and is really pushing up at 
the end.  
Ed