I can't see how changing this will actually break anything, though it may mess up some layout. It's so counterintuitive, it's like being given a bike to ride and then somebody telling you after two hours of you falling off, 'oh yeah, you can't ride it *forwards*, unless you press this switch under the mudguard.' At least, that's how I felt about it the first time I spent a day trying to work out what was going on.
You spent a full day figuring that out too? Glad I'm not the only one; not to make lite of you. For me, it was hard justifiying to my employer why it took me a full day just to get a simple batch loop to work. (Obviously, I must have sid something right though, because I'm still here! **Whew**) I vote for the default of zero. Tommy Innovation: The Best Way To Predict The Future ... Is To Create It.