Weird ClickEvent issue

[Chip]

I have a panel widget that contains a FlowPanel to which I add two
PushButtons. For some reason the first button added needs a double
click to call the onClick handler, while the second button added
correctly calls it in the single click. If I simpy swap the add calls
of the two buttons the other button exhibits the behavior. I have no
idea what could cause this, Anyone have a clue?

Thanks,