Clinton Obama convention press

Talk to Clinton about the Convention

This explains the "leaks" pretty well:

"Sources close to both Obama and Clinton told ABC News that the New York senator is highly unlikely to allow her name to be formally submitted for a roll-call vote on the convention floor. The Obama campaign wants to avoid such a vote, since it would underscore the party's splits and remind voters of the divisive primary campaign between the two Democrats.

The refusal to publicly announce her intentions is widely seen as a bargaining chip Clinton is holding on to as party officials negotiate logistics regarding her convention speech and other activities, according to several Democrats who are closely involved in the matter.