I've seen this requested so many times that I'll just go ahead and tell people how to do it.
What it does is exactly what the topic says: Puts a line between the author column and the topic column.
Tested on UBB 6.1.0 Public Beta 1.4
http://www.zeldaglitches.com/ubb/authorline.html [ 10-10-2001: Message edited by: Travis ]