Plugin Settings Not Updating

The same problem at my blog.

What version of WordPress are you using?

I always run the latest versions.

I have v3.5.1 installed. Php 5.4.6.

Same issue here.

WP 3.5.1.

Make settings change, save settings, and settings are not saved.

Same issue here as well. WP 3.5.1. (on multi-site).

Latest WP and latest version of plugin.

Follow up: Our client was using shitty WP Engine for hosting and their Object Cache wasn’t displaying the settings. After disabling it the Infinite Scrolling options were saved.

Confirmed that flushing the cache on WPEngine works.