Sand tiles blink when unit walks nearby

[Caleb13]

I'm not sure if this is OpenXCOM bug or TFTD game files issue, so I'm posting it here. The thing is, raised white sand tiles blink when an unit walks nearby. It happens only on edges of the raised parts, but all units cause it, XCOM or alien. It's hard to explain, so I've recorded a short video that shows it:

https://www.filedropper.com/blinkingtile

I've tried several things to eliminate it, always starting a new battle to be sure:

-I made a fresh copy of all original TFTD CD files (files are dated 16.3.1995) - didn't help.
-I've tried tile fixes Warboy posted under Bug report #1251 - didn't help.
-I've tried enabling and disabling enhanced soldier sprites - didn't help.

I don't know if other tilesets are affected. I'm attaching a save if anyone wants to try this.

[Caleb13]

BTW, Warboy's tile fixes will crash all August 2016 nighlies if you start a mission with Triton in it. The game reports "Triton.map has 20x20 tiles, 10x20 is expected".

I understand tileset fixes are not developers' priority, I just mention it here in case anyone else runs into the problem.