Hi, just want to share about a problem that cost me quite a long time trying to find the reason:
Votes for anonymous users would not be recorded, the table in the MySQL was not changed, and when ever I reloaded the page, the same (by IP) user received back the initial number of votes.
The reason turned out to be the Object Caching that apparently prevented the updating of votes.
I solved the issue by adding into the W3 Total Cache's field "Never cache the following pages" at the "Object Cache" settings two lines:
/avia_feedback_box/ /relative path to the page where you display the feedback box/
Hope this will be helpful for others who wonder about similar stubborn behavior of Avia Feedback Box.