Don't know what to tell you, Ygrec, sorry. That "Search" button apparently calls up a javascript routine to drop down the menu. If anything at all drops down then javascript would seem to be working for you. I haven't a clue why all of the menu items would show up for me but only some for you.

If that happened to me, the one thing I could think of trying would be clearing my cache -- just in case I'd ended up with an incomplete copy of something that my browser was holding onto and trying to use instead of replacing at the first opportunity.