I got 100% in a couple of days. Only encountered one minor problem during that time. (The game froze once while swimming in the hub area.) The game installed to the HD just fine, the bridge to Tia Dalma's hut raised every time that I used the barrel, and all of the items appeared without fail. Perhaps they've released a more recent patch? =/
With regards to Tia Dalma's hut, I raised the bridge the first time in order to snag Blackbeard. I then purchased Fast Dig which appears on the porch nearby. I did not come back to that area and attempt to use the second barrel to actually enter the hut until I had over three million studs. (Enough to purchase the two hats located inside the hut.) If any new players are looking at this thread, you may want to take this approach, just to be safe. You shouldn't have any issues with the bridge if you wait to use the second barrel.