I'm currently having an issue with GD star rating loading forever. If it's set up for cache support it just shows the "GD star rating loading" box, and if I turn cache support off it works, BUT if you vote a thumbs up or down, it will then show the rotating flower/wheel forever. (It does count the vote, but you have to refresh the page to see the new vote).
After switching off all plugins one by one, I discovered that the problem is the PollDaddy plugin. For various reasons, we need to run both plugins on our site to interact with our users, and they used to work together just fine until about a week ago. I'll also post this at PollDaddy plugin support, because I don't know which update caused it, but I hope it's something that will be fixed in a new update.