Does this work with the WP SuperCache plugin?

We are not aware of any conflicts with the WP Super Cache plugin, but you are right that cache plugins are notoriously tricky – let us know if you have any problems.

I think I’ll start off with just one question to avoid any issues with cache plugins and see how that goes.

Also does you plugin override Akismet or work in front of it?

In front of.

Right. I tried the plugin for a couple of hours with one question. Initially it seemed to work but when I came back later the same answer didn’t work, even though only one answer was possible. So clearly WP SuperCache and this plugin don’t want to play nice with each other :(.

I’m guessing that even though we only had one question you must have something else, like a code or field name, that does still change dynamically.

It could be the browser’s handling of cached variables. As per your original post, caching and anti-spam don’t seem to mix very well.