I love the RTM for Gmail extension on Firefox. I especially like being able to star an email and automatically create a task. I like it so much I became a Pro subscriber. That is why I am so frustrated that RTM only works fully 1 week in 5 (optimistically) as they cannot keep up with the Gmail upgrade cycle. At most times I don't even see the "Task" option in settings. I am able to work with tasks, but cannot use the most powerful features. I don't know if it's possible, but I highly recommend that you find a way to re-architect so that RTM is less susceptible to Gmail upgrades. That way it will work fully a higher percentage of the time and you'll have happier, more addicted, customers.

Jose