Lines appear between blocks

Lines appear between blocks, as shown in the attached screenshots. I know this has been reported before, but I have more details than other posts have had. First of all, Anisotropic Filtering fixed the issue back in 1.7.10(and probably older versions, I haven't tried it), but that option was removed in 1.8, leaving no fix. The only other post related to this(that I found) that wasn't marked as a duplicate said to disable mipmapping, which didn't solve the issue on my system.