Bug – RSS Widget Update Timer

If I put in a time value under “Widgets->RSS Widget: update timer” then every RSS plugin I use throws an error.

If I disable all RSS related plugins and use the built-in RSS widget, then it works fine.

This is the RSS plugin I use the most:

http://wordpress.org/plugins/rss-just-better/

https://wordpress.org/plugins/many-tips-together/