I wouldn't bother with the Fastpass either.
We were at the 3:55 show on 6/5. The Fastpass line was the MOST disorganized, chaotic thing I have ever seen at Disney!! A CM was in the midst of a huge crowd with a bullhorn, trying to get people to form a line. Meanwhile, everyone was asking, "Where is the Fastpass line?" Finally, she told a large group of guests in fluorescent orange rain ponchos, "The Fastpass line starts RIGHT HERE, and YOU will be the first people! Everyone, line up behind these people!"
All the Fastpasses had already been distributed, and other guests were telling us that there were no stand-by seats. That didn't make any sense to me, so I just ignored them, went past all the people still trying to get into the totally non-existant Fastpass line, and walked up to a CM at the entrance of the theater, and asked if we there were anymore seats available for stand-by. He said he didn't know, but we were welcome to go in and see. So, we just sauntered on in, waited in a holding area for about 3 minutes, then got in and got seats immediately at the left side of the theater! I think the Fastpass folks were STILL out in the front, trying to figure out where to line up!!