I did some work in the Shanghai area, however there's a problem (maybe it's just me) with Osmarender. When you use Osmarender to view the city of Shanghai, China, there are many tiles over land where the background is completely blue (indicating water) when it is actually land. This problem doesnt appear in Mapnik, only Osmarender. Several fairly large square areas are completely with a blue background, even on areas of land.

I tried viewing the area with several browsers, all show the same problem.