Editing https://en.wikipedia.org/wiki/Don't_Worry,_Be_Happy#Charts, the charts table goes bonkers.
Some of the rows in that table are "normal" wikitext, some are generated using [[w:Template:Singlechart]]. The normal ones display correctly, the template ones have an additional empty table cell spliced in the middle. (It gets better: the cell is actually a <span> element inside the <tr>.)
Parsoid's rendering is correct with no random cells.
http://parsoid-lb.eqiad.wikimedia.org/enwiki/Don't_Worry%2C_Be_Happy?oldid=617765397
Another example: https://en.wikipedia.org/wiki/Benford's_law#Mathematical_statement