This bug bites only if the user does not specify focus_date. In this case, an uncaught exception is raised due to no "match" method in function object getToday.
At TG_Mediator line 420:
tl.focus_date = $table.attr("focus_date") || TG_Date.getToday;
SHOULD READ
tl.focus_date = $table.attr("focus_date") || TG_Date.getToday();
Thanks for TimeGlider!