[Rijs43]

for example if I go to settings, skin maintenance and I hit on Home configuration the 'sub menu pop up' does not show up.

Is this with Estuary. I don't see those menus. There is Settings>Interface>Skin>Configure skin

Yes similar.. it happens occasionally when menus needs to pop up but the issue is that these are not showing up.. so in your case when you hit configure skin there is another menu going to show up, however as said this last step does not show up and I have to reboot to get it working again.. sometimes even after rebooting twice.

Cheers.