Wiki styles appear not to work with or in tables.
Actually it does work on span level inside a cell
But block level styles are not applied to cells. I changed line 40 of wikistyles.php to read
'block' => 'p(?!\\sclass=)|div|ul|ol|dl|li|dt|pre|h[1-6]|td',
But then I cannot apply different styles to the cells of one row. The last style in a row takes precedence.