Scenario:
1- go to your "Login Redirector" settings
2- Click in the "Select the page you will go to after you are logged in:" dropdown
-> 5 options are displayed: Homepage, Dashboard, User's profile, http://localhost/elgg-2.3.7/groups/profile/48/my-group and test group
=> Issue N°1: it would have been nicer to have the custom redirect url in format: title|url to display the title in the dropdown
3- Select the "http://localhost/elgg-2.3.7/groups/profile/48/my-group" in the dropdown and save
4- Logout/login
=>Issue N°2: the redirection fails "Page not found" because the url is not correct:"http://localhost/elgg-2.3.7/custom_redirect"
i am testing this plugin in elgg 2.1 here and since the pagesetup is now gone, the plugin fails. i just moved the pagesetup function to run in the system init code and all is well again.
i upgraded my site to 2.2 temporarily and am using login_redirector v5.0. the custom redirect that i setup is being ignored. my dev site (2.3) is working correctly.