OK, so this happens since the UI update, but I noticed it last week. I had some games installed, and I wanted to free some space in my hard drive.

I did the usual thing: right click on the game I wanted to uninstall, go to manage, and click on uninstall. Nothing happens. I do it again, and nothing happens. I try with another video game, same thing, nothing happens. It's supposed that a pop up window should appear to confirm my decision, but there is no pop up window.

I tried to uninstall Steam and reinstall again, maybe that do the trick. I write my username and password, I put my verification code, and I proceed to change my Steam parameters. I select Spanish in the drop down menu language... and nothing happens. I try to opt in the Steam beta, and nothing happens.

So, every time there is a drop down menu or something similar, it's like I'm clicking onto the void. The menu disappears, there is no message, there is no pop up window, there is nothing. So, I can't to almost anything.

Does anyone know what should I do? I'm using Lubuntu.