Update: I had emailed the support, and they told me this bug was fixed. Good job, Flexibits!
This is my only complaint about Fantastical on iOS so far, besides the notifications that would be nice to have.
When I took this screenshot, it was December 13th, as you can see from the ‘Tomorrow 14/12/2012’ section. So the 7th with its two events was six days in the past. A double-tap on the bar at the top is supposed to bring me to ’today’, but apparently this special situation (no events for 7 days) causes Fantastical to not have a tile for the 13th. I hope this counts as a bug gets fixed.
Other than that, I really like the app.