Yeah they fixed the screen jump glitch for DX. The rupee trick is still there so maybe that isn't a glitch.
And I can't believe people haven't mentioned some of the things you can do with Marin as you escort her to Animal Village. Like picking up the crane game guy or the rather disturbing...
Another trick or glitch or whatever is useful for buying the bow & arrows faster. When you buy the shovel (which costs 200 rupees) and as your rupees drain, save your game quick and come back. Depending on when you saved you will have kept the rupees at that point. Makes it a little easier to...
I used to be very dependent on the screen glitch in LA to make my way through the game, until I realized I really couldn't say I beat the game until I finished it for real.