Not seen anything on this Col, large asteroid to pass on the 12th about 18 lunar distances from Earth. http://www.spaceweather.com/
May explain the reports
NEO Close Approaches DEC2012
The approaches by NEOs thus far detected for DEC 2012 only includes ONE with an LD (Lunar Distance) of less than LD10!
Asteroid 4179 Toutatis with a diameter of 5.4 kilometers (3.36 miles diameter - big enough!!!) will pass safely at 18LD but there may be debris from it that will increase meteor activity a few days just prior and following its passing on 12DEC2012; CAMERAS and OBSERVERS READY! - File a sighting report on this site IF you witness a bolide, fireball or meteor; thank you!
This list WILL certainly be updated or proven incomplete this month, December 2012. Meteor/Fireball activity for December 2012 will continue to be at an increased level. Check back as more NEOs will be found and announced.
-LunarMeteorite*Hunter, Tokyo, Japan
Nothing to worry about.