I have this issue with a nvidia card on linux. Assuming you have the nvidia drivers, this can be solved by opening up the nvidia control panel and ticking Use Conformant Texture Clamping under OpenGL settings. This "replaces GL_CLAMP with GL_CLAMP_TO_EDGE for border less 2d textures, eliminating seams seen at the edge of textures in older games such as quake3"(quoted from the control panel), I suppose this may be fixable in the code also (not just a graphics driver issue), if the call to GL_CLAMP was replaced with GL_CLAMP_TO_EDGE
MC-1327
Sorry, I did search, but used to narrow a search, and didn't find that.
I have this issue with a nvidia card on linux. Assuming you have the nvidia drivers, this can be solved by opening up the nvidia control panel and ticking Use Conformant Texture Clamping under OpenGL settings. This "replaces GL_CLAMP with GL_CLAMP_TO_EDGE for border less 2d textures, eliminating seams seen at the edge of textures in older games such as quake3"(quoted from the control panel), I suppose this may be fixable in the code also (not just a graphics driver issue), if the call to GL_CLAMP was replaced with GL_CLAMP_TO_EDGE
Also 2013-03-06_14.50.13.png looks like a separate issue to me, as the lines are not just at the edge.