Descriptive Problem Summary:
Graphical issue when displaying map. (Accidentally clicked a link and I had to rewrite, so this post has been shortened). These are screenshots that display the before and after when following the steps below.
Before:
http://files.byondhome.com/Megablaze/ Pixel%20RPG%202012-07-19%20152203.png
After:
http://files.byondhome.com/Megablaze/ Pixel%20RPG%202012-07-19%20152209.png

Numbered Steps to Reproduce Problem:
- Load the game given in the link
- Walk Eastwards to the next area
- Walk back to the previous location
- View results

Link to Reproduce Problem:
http://files.byondhome.com/Megablaze/Pixel%20RPG.zip

Expected Results:
Expected results are seen upon start up and when the map refreshes.

Actual Results:
Random missing turfs.

Does the problem occur:
Every time? Or how often?
Every time when following above steps
In other games?
Unknown
In other user accounts?
N/A
On other computers?
Unknown

When does the problem NOT occur?
Always when following those steps, but it doesn't happen when walking towards the spot from other directions.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked?
Doesn't work in 494, 495, or 496, previous versions haven't been tested because I use maptext.

Workarounds:
Unknown, the map can be refreshed by hitting space bar to pause/unpause (which changes the client.eye location), or when walking westwards then back east to the glitched spot.

Side Note:
I can send the source to Lummox/Tom if required, just leave me a contact.