Al Jazeera had a prominent sign near the podium at the 2004 Democratic National Convention. Now it's gone, and the Arab news network is wondering why convention officials had it removed.Al-Jazeera, criticized in the West for percieved Anti-American slant, isn't charging convention officials with bias. 'We think this is a matter they just didn't handle well,' spokeswoman Stephanie Thomas said. Still, she says, 'I don't think anyone would deny that the Al-Jazeera logo and name are not a part of John Kerry's communications plan.'The Al Jazeera sign, with its name and logo, would have been part of the network backdrop...