Narrative:

Cleared to 16000 ft. Controller called out of 15500 ft and said, 'what is your altitude?' I responded, '15500 ft.' controller said, 'you were a problem' and controller said he would get back to me, but he didn't.

Google
 

Original NASA ASRS Text

Title: B757 FLC OVERSHOOTS ASSIGNED ALT AND IS CHALLENGED BY CTLR BUT IS NOT ADVISED WHAT OR IF A CONFLICTION OCCURRED.

Narrative: CLRED TO 16000 FT. CTLR CALLED OUT OF 15500 FT AND SAID, 'WHAT IS YOUR ALT?' I RESPONDED, '15500 FT.' CTLR SAID, 'YOU WERE A PROB' AND CTLR SAID HE WOULD GET BACK TO ME, BUT HE DIDN'T.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.