Bug: Scrolling causes Text Comparison to display the whole Book

When linked to a bible scrolling to the start of a Book causes the whole Book to be listed in TC

Software version: 4.0a & 4.0b.
Reported by Dave Hooton.
Forum link: http://community.logos.com/forums/t/13269.aspx
Also http://community.logos.com/forums/t/5573.aspx
Status: confirmed