This quest is pretty fun, aside from a few glitches that I'm running into. None of them have been game stopping yet, just a few incidences of getting "stuck" and having to save and restart, nothing major. Anyway, was I supposed to give the Yoshi doll to the kid on the island who says that you have to give him a toy? After he quit talking, I was able to walk right past him w/o giving him the Yoshi doll then went up and got the cucco book. So, I now have both in my inventory.
Also, after level 7, when you push the blocks to get into the room to talk to Desmond (the one who tells you to keep going a certain direction to get what you want), you can't get back out because the barriers are back up in front of the door. It's just been small things like this, little bugs that really haven't had much interference with the game play but can be a tad annoying. All in all, a fun quest. The level 7 boss was a bit hard, but I did manage to find the shop that sold the red potion, so I finally beat it.
ETA that I didn't realize there was a fixed version of the quest, so I just downloaded it and hopefully the problem is fixed

Edit once again

Nope, the problem is still there, Link can't get back into the water, he just walks out onto the ladder:

Edited by propdoc, 14 November 2010 - 09:54 AM.