hm. i consider divs that flash their content then hide as a fouc problem (oh yeah not that i, personally, have ever had a problem with that 😉...)
i tried cookies only, it didn’t help. well, it’s not a fatal problem to function of the ee2 cp just a small visual hiccup. i don’t want to take over the support forums over this! 😊
eta: just to clarify, what i see is the preferences, etc. OPEN then they flash closed. are they supposed to do that?