Bonn (AFP) - Nations will have to roll up their sleeves and make important compromises to meet the deadline, just 14 months off, for a global pact on curbing climate change, observers say.Worrying signs of obstinance emerged from six days of UN talks in Bonn which ended Saturday.Experts said those discussions fell short of their goal to set parameters for a ministerial-level drafting meeting in Lima in December for a deal to be inked the following year."There are some danger signals about the way we're coming out of here.