Texture Bleed - White Edges?

[kongkim]

Hi, I have some problems. I keep getting white edges on my textures, where the pixels bleed together.

I have not always had this problem and normally used the trick with a 1% black background.

If you look at the image you can see the white lines on-top of the walls where the door frame meet the wall.
https://i.imgur.com/t0xUDft.png

I tried so many things and I'm all out of ideas now, so hope someone can help.

I work in photoshop for this.