Fix for menu:
Go to administration > configuration > current theme > Modify stylesheets > index.css
Find:
replace whole thing withCode:#topnav li:hover ul, #topnav li.sfhover ul {
The menu was being displayed too far away from the parent button, thus being hid before the mouse could reach it.Code:#topnav li:hover ul, #topnav li.sfhover ul { top: 40px; left: 0; }
Tobias, from rs-ps.