If you create a table with multiple columns and then create a table with multiple columns inside that one, you will sometimes see an issue with indents where the table contents will be heavily indented on the left which pushes the table off the right side of the page.
Several workarounds were published on Notes.net. The best one is a stylesheet addition:
margin:0px; padding:0px; }
The margin UL tag fixes the issue in IE. The padding UL tag fixes the issue in Netscape.
This issue has been seen in 5 through the 5.12 stream. I have not seen it for Domino 6 yet.