INTERNATIONAL ORDERS: Please be aware that the new posters are available in the United States only (for now). If you add the poster to your cart alone or with other items and you try to check out you will see at step 3 Delivery methods "There are no shipping methods available". Removing the poster from the cart should allow you to check out normally. Posters are the only items that will cause this.
Get your poster out safely! I wanted to point out that the shipping tubes I bought and have been using seem REALLY tight! Be careful prying them open. I mail the posters rolled with craft tissue paper so they should be able to remove from the mailing tube without damaging the poster but here's a trick if the posters have unwound enough to make them hard to remove. Twisting the poster inward is spot-on if you're having trouble. My guess is most of you wont need the video but it explains it better than I could if you do!