Today, I found that I was unable to change permissions anymore after upgrading to 1.10. This is the following error that pops up.
Declaration of CemZoo_Username_DataWriter_User::_verifyUsername() should be compatible with that of XenForo_DataWriter_User::_verifyUsername() 1. XenForo_Application::handlePhpError() in XenForo/Autoloader.php at line 119 2. XenForo_Autoloader::autoload() in XenForo/Autoloader.php at line 119 3. XenForo_Autoloader->autoload() in XenForo/Application.php at line 857 4. XenForo_Application::autoload() in XenForo/Application.php at line 397 5. XenForo_Application::resolveDynamicClass() in XenForo/DataWriter.php at line 1975 6. XenForo_DataWriter::create() in XenForo/ControllerAdmin/User.php at line 461 7. XenForo_ControllerAdmin_User->actionSave() in XenForo/FrontController.php at line 310 8. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132 9. XenForo_FrontController->run() in /home/jonathan/******.***********.***/admin.php at line 13