Also have this problem. Got a js error. Seems some wp version not load jQueryUI successfully, so just comment some lines in admin.js solved this issue.
Same issue here, with wpmu2.7.1 + NextGEN new installed.
Now is OK with PIUGIN_COMMANDER installed. Use this plugin to control NextGEN plugin…
Same issue. Site admin can work, but doesn’t show up in other users.
