Just flown PANC-EGCC in the Queen. I took a shortcut and flew dct ADN after SIDER, cutting off a big corner. When I got within 150nm of top of descent I noticed there was no green dot showing on the map display. The aircraft commenced descent on schedule in VNAV mode but still no t/d dot on the display. I was running FS Metar; don't know if that had anything to do with it.Thanks in anticipationRob

Update: doing another short flight now EBBR-EGCC and the t/d is showing normally on the map. Must have been a one-off glitch before. I remember now that I altered a display setting in FS9 during the previous flight. I unchecked the 'render to texture' box to stop the screen blinking every time FS Metar updated. For some reason that caused the Queen's autothrottle to disconnect and I had to re-engage VNAV to get the THR REF annunciator to reappear. I guess that may be somehow tied in with the non-appearance of the t/descent spot later in the flight.Rob

Rob,If you find a reproducible scenario for this problem let me know...