Compatible up to: 3.5.2??

I have it running on 3.8.1 and it seems to be working fine. From what I can tell, the coding doesn’t seem too dependent on specific versions to work properly. I would recommend deactivating all you plugins, or putting an underscore in front of the plugins folder temporarily. That will deactivate all your plugins, and if the issue persists beyond that, then it is most likely not a plugin issue. If that solves the issue, then remove the underscore and manually deactivate all your plugins from the plugin menu. That way you can turn them on one by one, checking each time to see if the problem develops again. Just my two cents…