Second Dress -- Sleeve Problems

Hm, well, the dress is almost done, much to my surprise. I think the longest time I've spent was hand-stitching the lace inserts. I took some photos today of the dress progress, but am not able to download them right away. You shall have them tomorrow.

But for now, I have a slight problem. My sleeves are not going in smoothly. There is a pucker on each side where the sleeve flows down the arm. (Instead of cap or 3/4 sleeves, I am doing just simple short sleeves. 3/4 is a little too long for the summertime weather where I will be traveling soon.)

Does anyone know how to ease the sleeves in such an intricate design as this pattern calls for? Please see the sleeve photo.