I have been using AVG Free for many years and never have detected anything. I installed Pidgin today and while copying to a backup drive AVG detected one of the DLL files as a trojan. I can not remember the file name since it automatically took care of it. But there must be a DLL in the installation file that is either a true trojan, or a DLL that has a name identical to a trojan and that is why it is flagged from the database. Either way, I thought I should let you know. For now I deleted the program.
Thanks!