Mr. Churkin disputed that point, however, saying that the mediator would be appointed by Mr. Annan, not the Syrian government.

WSJ: U.N. Agrees to Send Observers to Syria

The fate of the Abyei region and other disputed border areas are also a point of contention.

CNN: South Sudan says it has seized disputed oil-rich area

The fate of disputed border areas is also a point of contention.

CNN: Sudan president vows to 'punish' South Sudan

The fate of disputed border areas are also a point of contention.

CNN: South Sudan says it is withdrawing from disputed oil region

Case in point: Best Buy has disputed more than a dozen geek-themed trademarks in the past decade, The Wall Street Journal reported in June, citing federal records.

WSJ: Best Buy Jumps Into Small Business IT Services

One would ban abortions after 20 weeks of pregnancy based on the disputed premise that fetuses feel pain at that point.

NPR: Rallies Held To Protest ND Anti-Abortion Measures