The two tables below contain the following coding: 

TABLE 1. <table border>
 
TABLE 2. <table frame="border" rules="all">

TEST: The tables below should render identically

TABLE 1

THEAD THEAD THEAD
TFOOT TFOOT TFOOT
TBODY TBODY TBODY
TBODY TBODY TBODY

TABLE 2

THEAD THEAD THEAD
TFOOT TFOOT TFOOT
TBODY TBODY TBODY
TBODY TBODY TBODY