I overlooked the fact that your plugin is configured to set the user prefs threshold as "required_hits" instead of the new syntax being "required_score" in 3.2.x.
Also, an issue that I see is, if a user logs in to roundcube and they click on personal settings and go to the spam tab, it will show a threshold and a everything as already being setup. Even though they do not have any settings in the userprefs table at all. It would be nice to see an enable/disable button or something to that affect. So a user that doesnt have spam filtering turned on, would go to the page and all the defaults would be filled in, they would just have to click an enable button which would put all the necessary settings in the table or if they click disable, it would remove all the settings etc.
Thanks for your time and quick response. I hope you find my suggestions useful.