[QUOTE
If you have every been to Dusseldorf and seen the taxiway at the railway station end of the runway you will notice that the exit taxyway from the end is actually on a small gradient. When taking photographs from the roof of the railway station, the elevation makes the slope seem more apparent and the following image was also rejected…
QUOTE]
I sympathise with you as well, I was in Dusseldorf last month and I’m in the middle of trying to upload 100 or so photos. I’m finding that sometimes I get most on, the next day a lot get rejected due to the horizon! I’m convinced as well that it depends on the screener(s) on that particular day. One thing though, due to more and more people using DSLR’s, the standard has never been higher, perhaps they can afford to be more picky than ever!