Hehehe, for this kind of bug you have to be very careful about what the users are posting my helper friends.
quote:
Select an custom emoticon from the emoticon list
The reason of the bug is quite simple: you cannot select an emoticon from the emoticon panel of Messenger and use a Plus! feature with it, emoticons will be deleted in that case. Thsi has nothign to do with (!FC0) in particular, you would have the same problem with any other tag (like (!N) for example). However, I have good news for you: this limitation does not apply if you're using a keyboard shortcut to specify your color. So, if you type Ctrl+K then 0 instead of (!FC0), it will work fine and the emotion will stay in the message.