There were more attacks in Ghazni than there were in Kandahar and Helmand in the fourth quarter of 2010,
according to a recently released report by the Afghanistan NGO Safety Office (ANSO),
a non-profit which advises humanitarian organizations on the security situation in Afghanistan.
This makes Ghazni province, where most Polish troops are stationed, the most violenct province in Afghanistan.
The surge is certainly to blame at least in-part, 
as operations pushed the Taliban out of their traditional strongholds in Helmand and Kandahar (historically the most dangerous areas in Afghanistan).