Vram flag kills mipmaps?

Blitz3D Forums/Blitz3D Programming/Vram flag kills mipmaps?

Come across this while messing with some DX stuff:

tex=CreateTexture(512,512,1+8) ; mipmaps created
tex=CreateTexture(512,512,1+8+256) ; no mipmaps created

Same thing happens with LoadTexture()

Using v1.88

Is this a bug?