Steps to recreate:
1) Started new game, played through to the first jump tutorial (second area)
2) Accidentally hit the 'Go back one page' button on mouse
3) Firefox (3.6.6) hung for approx 20-25 secs and then went back to the Home page
4) When I entered the world again, my inventory was full of items I'd already accumulated but I had to replay the tutorial.
Additionally, the weedy patch did not pop up a seed for this second time through the tutorial.
Desired Result:
Ideally, I'd resume in the second area of the tutorial, near the jump spot (and not play through the (admittedly short) first section of the tutorial.