This looks to be another CSS bug for IE6. I have done some reading and researching this at it looks like this issue may be related to the mysterious hasLayout property. I was not able to locate an exact example of the problem you are experiencing nor was I able to find a solution to this particular display issue.
Has anyone else out in our forum seen this type of thing and know how to resolve it?
I will look for any response here, if I can't find anything I will try investigating this further to see if I can help you get rid of those lines.
Let me know if you find out something, or if you cannot locate anything.
