I'm running Gimp 2.6.12 on Linux Mint 13. It's in my home folder: ~/.gimp-2.6/plug-ins/split_layer_into_tiles.py and I chmod'd it to og+x so that it's executable.
I look at the source and it's supposed to be located at Layer/Split layer into tiles but it's not there.
I checked my loaded plugins and it's not loaded.
Any advice on how to get this working?
It should be visible at the bottom of the Layers menu.
Download the file again. I checked it, and it has wrong extension. It´s Split_layer_into_tiles.py.txt
When You download it (right-click save as), remove the .txt from the end and change savetype field as "all files" (windows). On Linux there´s probably save as "python", after removing .txt.