Moving Categories Bug - Google Tasks on iOS

I'm using GeeTasksLite version 1.49 on my iPod Touch and have the following problem:

When I move a task to another category I get the following message in a popup window: "Moving tasks across lists is currently disabled due to changes made by Google. Please wait for the next update 1.43 due around September 5th to get this functionality back".

I'd attach a screenshot, but I can't figure out how to do that in this forum.

Is this a known bug? I haven't seen anything in the forums or app store reviews.

Cheers,