I'm having the same problem. I forward a lot of emails into GTD Next, then go to the task list to clean them up and categorize them. Just now, I've tried deleting the text from the Notes section of the task, but cannot. The notes area shows as blank once I hit the Delete key (Mac OS), but if I click away and come back, the text is there.
Changing browsers. Problem noticed in Safari, but still there in Chrome.
Changing keys use. Tried both Delete and Fn-Delete. Neither does a permanent delete.
The tasks have the Notes indicator. It doesn't matter whether I click the indicator and do the deletion inline, or if I do the deletion in the side panel.
Don't remember having this problem before. Thoughts?