Firstly, bug fixes:
The notice at the bottom of the drafts has been corrected so that the web address only has one http in it.
A typo in a line of code that was resetting the palette to defaults when the page was refreshed has been corrected (our thanks to Mark, who spotted it).
The instructions page now includes a note about using TDD for vacant-hole patterns.
Secondly, interface additions:You can now choose how dark you want the grey backwards turn squares using a slider in the display section of the control panel. This should hopefully make TDD more useful for people who would prefer a greater level of contrast between the backgrounds of the two types of squares (our thanks to kjax, who inspired this addition during a Ravelry private message exchange).
The display section now also gives you the option to add a red horizontal line to the draft at the turning reversal points. I know many weavers prefer to mark this point as they weave by flipping tablets that need to change twining direction, rather than turning backwards or forwards.