a few emoticons have problems as I can see:

OK, first off, if you were intending to duplicate smilies with different codes, then ignore a lot of what I'm about to post.

you can get with : D, :- D, and :grin :

you can get with : ?, :- ?, and : ??? :

you can get with : ), :- ) and :smile :

you can get :o with : o, :eek : and :- o

you can get with : (, :- (, and :sad :

 

you can get with ; ),;- ), and :wink :

you can get with : |, :- | and :neutral :

you can get with : p, : P, :- P and :razz :

you can get with 8 ), 8- ) and :cool :

you can get with :roll : and :rolleyes :

you can get with :mad :, : x and :- x

 

you can get with :lol : and :haha :

you can't get : oops : with , because the board recognizes :o and skips the ops:!

you can get with :evil : and :twisted :

hell, there may be more, but I'm sick of listing them

just thought I'd give a heads-up.