Not sure if this is the correct sub forum but it is a visual issue. Whilst the deflector pulse is active there's a strange effect on the hull where all the hull markings, lights and registry number and name is surrounded by a red background. I took a screenshot and have a link below;

http://i982.photobucket.com/albums/a...0-23-24-00.jpg

Not sure when this started as I very rarely run this mission but it was definitely there today (I got the screenshot today) and yesterday as well.