The rules for cell borders in "striped" tables do not take into account the monochromatic nature of multi-row <thead> elements. They just display vertical borders, but not horizontal ones.

Given the current monochromatic background of "table.striped thead", it would be better if all borders in the thead were displayed.

In addition, the style for table.striped has a duplicate entry for "table.striped > tbody > tr > th" which was probably a typo and which should be cleaned up.