MS Word diff is backwards

I'm using Word 2007.

When using diff on Word documents, I noticed the Word comparison is
backwards. I.e. if I add something to a document, Word says I deleted
it, and vice versa. This two line change to diff-doc.js seems to work
for me.

58c58

< destination = word.Documents.Open(sNewDoc);

---
> destination = word.Documents.Open(sBaseDoc);
76c76
<     destination.Compare(sBaseDoc, "Comparison", wdCompareTargetNew,
true, true);
---
>     destination.Compare(sNewDoc, "Comparison", wdCompareTargetNew,
true, true);
 
Or maybe it's a Word 2007-specific thing, in which case the fix would be
a bit trickier. Or maybe I'm missing something!
 
Greg