I think current line indicator should go through the returns and EOF character and stretch to the end of window, and it works that way in most cases. But it can not go through these characters and shrinks into a section in line comments, or when the highlight keyword setting includes “Highlight Right All”.
Please check demo here (Flash swf file): http://www.box.net/shared/0uvushe4oc :-D
I have fixed this issue for the next minor version. Thanks!