The TFS plugin reverses the original and modified versions when creating the
"diff" link (e.g., from the "changes" page,
http://<server>/job/<job_name>/<build>/changes)

This causes the diff display to incorrectly show inserts as deletes, and vice versa.

For example, the link is currently written as:

http://<tfs_server>/diff.aspx?opath=$/path/file&ocs=804011&mpath=$/path/file&mcs=804010

But it should be:

http://<tfs_server>/diff.aspx?opath=$/path/file&ocs=804010&mpath=$/path/file&mcs=804011