Please include a direct link in the future.
Just use the “permanentlink” Link at the map (down rights) and copy the URL.
An example would be http://www.openstreetmap.org/?lat=-34.053&lon=151.047&zoom=13&layers=O
This looks like a Osmarendere bug. I requested a rerendering at http://www.informationfreeway.org/?lat=-34.0371070352052&lon=151.0452321489134&zoom=12&layers=BF00F0
Zoom at Zoomlevel 12, hold the mouse over that area and press r for a rerenderrequest for osmarenderer, press i to see the state of a tile
edit
rerendering fixed the issue