I realize this Mod may not be supported any more, but just in case anyone knows the answer...
We have implemented this Mod at our forum. We have a few thousand active users, and there is something odd happening with display of the thumbs up/down icons.This is NOT the same problem as those with permissions etc that have been discussed a lot in the forum, because the thumbs up/down ARE showing in some environments.
For example, I can see the thumbs up/down on my ipad, but not from Chrome or Firefox. I know others can see the icons on Firefox OK, and it seems most people can see them on their iPads. But many people cannot see them at all, and noone seems to be able to see them on all their devices.
I have recommended people clear their browser caches, and I have refreshed template, imageset and theme, and then cleared the main board cache.
Can anyone think why some browsers in some environments can see the thumbs up/down while others can't? This cannot be permissions because looking at the same post in the same forum I can see the thumbs on my ipad but not FF. All I can think of is some conflicting addon, but in my Chrome environment in particular I have hardly any addons.