Height by % in Netscape

As a web developer I loathe netscape, but thats for another post... heres my question

I have a table with 0 to many rows coming from a database. On either side of the table (which is within another table's cell) I have two cells on either side of it, with a height = 100% so it will vary depending on how many rows it has. This works fine in IE, but netscape just has a single line. Any ideas? The cells are only 1 pixel wide so i can't put a nbsp; in there. Would a clear pixel help?