conflict with DirDiff plugin

[popsracer]

When vim-fugitive and DirDiff are both installed every time you open/select a file diff from the DirDiffs results window it creates an extra copy of the results window. Additionally the diff and results windows fail to resize.

[tpope]

I'm not that familiar with this plugin. I've tried creating two similar but different directories and playing around and I can't reproduce the weirdness you describe. It's possible I've already fixed it or that there's a third plugin or vimrc component that catalyzes the behavior. You might try stripping down the rest of your config to rule that out.