User blog comment:Rappy 4187/Technical Update: March 10, 2015/@comment-1251315-20150312231408/@comment-452-20150313004509

For anyone who wants to sidestep the problem by adding a "Power User" checkbox:

if (wgCanonicalSpecialPageName == "Listusers") $("fieldset.lu_fieldset tr:last-child").prepend('  Power Users ');