A protest in Sophia, Bulgaria on Wednesday 14 January was organized by student, environmental and farmer organisations. It was apparently attended by about 2,000 people. There was violence and over one hundred people were reportedly arrested. A second day of protest on 15 Jan. was peaceful.
Matty T., Peaceful Protest, Back in Bulgaria
Geryniko, YouTube Channel, Russian/Bulgaria (video)
Geryniko's video, from 14 Jan 2009 shows the police getting violent.
This Sophia Echo article takes a detailed look at the controversial events.