New Code!
Discount has been shoved up to version 2.1.2 with minor changes in the way I inhale and generate table blocks; the older version of the code would generate ghost <td></td>s if there were leading |’s in the table, and would leave trailing |’s in the output if the table had them.
If you don’t use tables, this should have no effect on your markdownification of the world, and if you do use tables, this should decrease your bewilderment over the differences between my implementation and the php markdown extra implementation.
But tables are actually somewhat useful, so you should grab this New Code! and see if it manages to explode for you.