I only encountered a problem and I think it's a beug Xoops, let me explain:
If outright removes the default theme called Xoops and is replaced by another, then jgrowl system is deactivated when it goes into administration / Preferences / General settings and parameters are valid, the overload of redirect.html is not taken into account!
A module or other page does it work only in Administration / Settings / General settings it does not take into account
Administration / preferences / general settings
Other links
Do you understand my problem?