First of all I would like to say that up until I saw this error yesterday I have been seriously impressed with this app, and I still am!
Yesterday I noticed that tasks I'd deleted/changed the due dates on were still present on Geetasks. To confirm this I acessed the iPhone version of the google tasks website, which correctly showed the changes. I then made more changes, which again were not replicated in Geetasks. Changes in Geetasks are still sent to Google and Geetasks always says the sync is complete.
Could this be a change at Google's end, as I'm pretty sure this was working before?
While I'm posting there are also a few little UI niggles I've noticed:
1 - when entering a due date, the dials are set to 2 days in the future, yet the readout at the top of the screen is the current date
2 - when adding a new item to a list sorted by "complete" the new, unticked item is placed at the bottom of the list, with the ticked items.
3 - when a task with subtasks is marked as complete, the subtasks are also marked as complete. It would make sense to me if when all subtasks are marked as complete the master task should also be marked complete.
Keep up the good work!