Dave Child's questions

Skype has been working fine for a fair while, but has (in the last week or so) stopped making notification sounds. Normal audio for calls is fine, but the ringtone and other alerts are now not making any noise at all.

The cause appears to be that the wav files are all missing.

I've not deleted them - at least, not knowingly - and not made any changes within Skype. I ran an update and upgrade to my whole system recently, so the cause is likely there, but I have no idea where to start looking to sort this out.

Is it just going to be simplest to download the sound files and set them all manually, or is this a known issue with another fix?

Edit: Forgot to say - the sound files are normally (I believe) in /usr/share/skype/sounds, but I don't have a /usr/share/skype folder at all.

Every so often my Ubuntu install goes a little weird. When I mouse-over any window decorations, or interface elements in some apps, they vanish. The window itself is still visible, just empty. I can't take a screenshot, because if I load a screenshot app I can't see what to click to grab a screenshot, so here's a photo instead.

I don't know what's causing this. The interface elements are all still click-able; I can maximize windows, open items ... everything, if I click in the right place. I just can't see what I'm clicking.

The global menu bar loads fine, and I see all menu options in the bar, but not in the drop-downs. My dropbox icon is visible and functional, and the drop-down menu loads on click ... but it's empty.

What could be causing this, and how can I get back to a working interface without restarting the machine or logging out?

I'm using 13.04, Compiz/Unity with a GeForce GT 640 card with the Nouveau driver.

I'd like to drag a few more folders to the places sidebar in nautilus, but want to group these new ones separately to the default folders (like Dropbox, Downloads and Documents). Is there a way to add a new separator to the list?