I haven't done anything about it because it's not a bug. If you have enough rep which was 3,500 you are able to make edits to any tutorial as we consider you a trusted member of the community.
I've increased it to 5,000 rep now, and because people have been vandalising other peoples tutorials I'm going to have to reconsider if this is a feature we can trust people with. It's a shame because it's going to take a lot of time to revert this feature which I'd rather spend elsewhere at the moment as I'm very busy.
If you have an issue with a feature you wish to bring to my attention please email me personally, I always check read and reply to all emails. Editing our most popular tutorial is not the way to go about it.Tom2012-06-28 13:40:34
Out of curiosity, what's the status on the ability to edit others' tutorials? I'm a technical writer and editor, and while I don't yet have 5,000 reputation points, I will before too long. I'd be very happy to silently clean up typos and make other minor corrections to tutorials as I'm reading.
(I would also direct message an author any time I made a modification, both out of courtesy and so that they could undo the change if they feel I've erroneously altered their meaning.)