Empty cells testcases: quirks mode

This table has huge borders on the empty cells in the middle column:

XX
X
XX

This table has huge borders on the empty cells in the middle row:

XX
X
XX

This table has empty cells for the entire middle column and row (with zero cellpadding and cellspacing):

xxxx
xxxx
xxxx
xxxx

This table has empty cells for the entire middle column and row, and has border, cellspacing, or cellpadding all zero:

XXXX
XXXX
XXXX
XXXX

This table has empty cells for the entire middle column and row, and has large border, cellspacing, and cellpadding:

XXXX
XXXX
XXXX
XXXX