Hi I am Rory with the Statcounter team. We are investigating this issue right now.
I have installed the eset security program and visited sites with Statcounter where people say we are injecting bad scripts. I see no warnings or errors from the Eset program. I have also used Google Safebrowsing tool to scan these sites and it reports no problems. I have tried other sites which scan for malware and they also report no problems.
I have a special test page which only loads Statcounter. On this page Eset also gives no error or warning and when I check the network traffic there is nothing being loaded except Statcounter.
If Statcounter was hacked and inserting bad scripts I should see it on my end also since I have Eset installed. But this is not the case. So this clue tells us perhaps something else is going on.
Kind regards,
Rory
Statcounter Team