Actually, technically speaking, he signed for United (Smiling
and posing and all) only to claim that he was "forced" to sign.
United, or rather Fergie, knows that it's important only to keep
contented players (think of the sale of Stam, Becks, Keane,
Ronaldo, etc) so they negotiated with Chelsea and managed to get
12m for a player who has not make a single appearance for the
team.
Now does Bebe's deal sound familiar? 