Working with this tag for the first time in a trial version of CF 11. I'm unable to pass any URL vars with the source without error, for both .cfm and .html pages. For example, source="myPage.html" works as expected, but source="myPage.html?x=1" throws a 500 error.
When the urltoken is not passed with the source when the source is a .cfm page, the session (login) is not recognized and we get thrown to the login page.