Curiosity Rover Update: Live Stream

"We have no definitive detection of Martian organics at this point, but we will keep looking in the diverse environments of Gale Crater," said SAM Principal Investigator Paul Mahaffy of NASA's Goddard Space Flight Center in Greenbelt, Md.

Later in the release:

SAM tentatively identified the oxygen and chlorine compound perchlorate. This is a reactive chemical previously found in arctic Martian soil by NASA's Phoenix Lander. Reactions with other chemicals heated in SAM formed chlorinated methane compounds -- one-carbon organics that were detected by the instrument. The chlorine is of Martian origin, but it is possible the carbon may be of Earth origin, carried by Curiosity and detected by SAM's high sensitivity design.

So it seems that they've found martian chlorine and an undetermined source of carbon that when heated with other chemicals in the sample analysis on mars instrument form organics. That's not to say that these reactions occur or do not occur naturally on Mars.

[1] - http://mars.jpl.nasa.gov/msl/news/whatsnew/index.cfm?FuseAct...