premise: Ahtisaari said that he expected the direct talks between Belgrade and Pristina to start early next year.
  "In order for us to make progress in these talks, it is important to make progress on the (democratic) standards, and that requires not only the actions and measures by the Kosovo Albanians, but also the cooperation of minority population, including the Serbs," Ahtisaari said.
  There are some 100,000 Kosovo Serbs, living in isolated enclaves. They have been boycotting the province's institutions, complaining of harassment by majority ethnic Albanians.
  Late on Saturday, Ahtisaari traveled to Albania where he met with Albanian leaders. From Albania, Ahtisaari will travel to Macedonia, which also has a sizable restive ethnic Albanian minority.
   Why were the Serbs complaining?
hypothesis: harassment by majority ethnic Albanians