There's an error in pol-gui.cfg. It should say
Fixed, thanks.
That was it. There's apparently a bug in my version of Photoshop, something about Matte when exporting png's.
Never load and save png in Photoshop. It have its own way of interpretation of alpha channel. First, convert png to tga using SE console command:
SaveTGA "data/textures/common/interface_mod.png"
Then edit this tga file with Photoshop. After this, convert it back to png using another command:
SavePNG "data/textures/common/interface_mod.tga"
Yeah, but seriously... Spanish with Mexican flag rather than Spanish flag?
And while we're on that rant, English language with U.S. flag? Do they not teach geography in schools anymore?
Because SE English is American English?
The same reason with Spanish.