I have no problems with the seat selector either.
A note about EUA - it doesn't care what your preference is. It assigns all the aisle seats first, then once those are full it assigns the window seats. The pattern seems to be pretty reliable.
EDIT: Oops, I didn't realize I was in the Continental forum. The information I posted pertains to Northwest - it may or may not be the same for Continental.
[This message has been edited by timf (edited 03-18-2003).]