Grey line appearing on SCORM published page

I have a strange anomaly happening with my lectora projects.

Here are the details:

link to my HTML testing environment:

Course Overview

My project is about 70 pages or so long - the problem is with the first page of the course (for all of our 5 courses). Unfortunately I have not been able to recreate the problem, but have been sent screen shots of the issue from the SABA support person, alerting us of the issue in their testing environment. Also several reviewers have seen the line while reviewing the course from the above link. I have attached 2 screen shots.

[ATTACH=CONFIG]193[/ATTACH][ATTACH=CONFIG]194[/ATTACH]

The line appears across the chest/shoulders area of the image and extends across the whole page.

I have checked the Adobe Photoshop files for lines in the images and have found none, just to eliminate the obvious.

Can anyone suggest a solution or possible cause for this line? I have been tasked with getting rid of it!

Tammy