When we submit diffs via the web interface (Differential --> Create Diff --> Raw Diff field), we don't get context. Typically folks here are using TortoiseSVN --> "Create Patch" to generate the diff. I realize these diffs have only relative paths in them, however TortoiseSVN itself is smart enough to figure out (when you use "Apply Patch") if there is some path in the source tree which might possibly match the diff (it even prompts you to confirm). A similar feature for Phabricator would be awesome, since not having context makes review using differential kind of sub-par.