I'm so sorry about this. GQueues saves tasks as you enter them, but if you go away from the page right away, then they may have not had a chance to save completely.
I have made a change that overwrites the normal browser behavior for the "backspace" key so the browser won't take you to a previous webpage. This change will go out in the next update.
Thanks for mentioning this issue, and sorry again for the hassle.
Using Chrome, when NOT in a task/cell, when you hit backspace I think the browser takes thinks I want to go back to the "previous page", which then reloads all GQueues, and nothing (apparently) is saved.... so I lost all the bajillion tasks I had just entered in the past 15 minutes. Is there a way to fix that?