Descriptive Problem Summary:
When objects with a layer equal to the turf they sit on have a pixel_x >= 0 and a pixel_y >= 0, they change between being over top of the adjacent turf to the east, and under it, depending on the x position of the viewer.

Numbered Steps to Reproduce Problem:

1. Make obj with layer = TURF_LAYER
2. Place obj on map, with pixel_x = 16
3. Go into game, watch half of it flicker into and out of existence as you change position.

Expected Results:
The object stays graphically above the turf east of its location, like it does with the northern, western and southern turfs.

Actual Results:
The object is either over or under the eastern turf, depending on the x coordinates of the observer.

Does the problem occur:
Every time? Or how often? Every time.
In other games? Yes.
In other user accounts? Yes.
On other computers? Yes.

When does the problem NOT occur?
The problem does not occur with negative or zero values of pixel_x, and does not occur with positive pixel_x, but negative pixel_y values.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked? I think it's been like this in all versions that have had pixel offsets.

Workarounds:
Place objects 1 layer above turfs, or use negative pixel_y values.