inside cube and textures

OpenGL OpenGL: Basic Coding
1

Camera is inside cube, internal cube walls have got textures but I see black lines between each two walls - example: http://img268.imageshack.us/i/beztytuuxab.jpg/
why ?

2

Perhaps this
http://www.opengl.org/wiki/Common_Mistakes#Texture_edge_color_problem

3

Set your texture filtering to GL_CLAMP_TO_EDGE to avoid sampling at the border.