(In reply to comment #0)

There is an issue with complicated tables, where there are two header rows,
with rowspans on some of the header elements. When you try to sort, the
tablesorter will 'explode' the rowspans, and it does this not only on tbody
elements, but also on thead elements.

Suggest we change $table.find( '[rowspan]' ).each(function() to $table.find(
'tbody [rowspan]' ).each(function()

I'm not sure if that will work, but it might...

I'll give that a spin.

Fixed in r99092, will deploy shortly. Derk-Jan's suggestion was spot on, thanks!