When Jin and Mr. Eko are hiding in the bushes from the Others, a group of them walk by. We see a shot of their legs as they walk. In the first shot, we see the two pairs of legs in front, then in the last shot of the group, we see the same two pairs of legs now in the back of the line, right in front of the very last pair, which belong to a child.
In the flashback to Jin's job interview at the Seoul Gateway Hotel, his resume is in Korean but his name also appears in the Latin alphabet. However, it is spelled Jin-Soo Kwan, while it should appear as Kwan Jin-Soo, since family names are always first in Korean.