Misnested

misnested parentheses

[…] but it also reduces the likelihood of the "unterminated string literal" error message that can easily occur for seemingly trivial reasons when you're working with long strings — an accidental carriage return or a misnested quotation mark is all it takes.

Netscape is of course pretty buggy, but it generally handles nested tables OK so I suspect your problem is misnested or unclosed table tags […]