How to install Skype on Ubuntu
There are several methods for installing Skype on Ubuntu:
From the Skype website (not recommended)
I assume that this is actually what you've did. I actually never used this method because:
It provides you a package designed for Ubuntu 12.04. So it might not support well later versions. For example, if there is a dependency renaming between Ubuntu 12.04 and 14.10 versions, it will clearly not support well your version. I can't really tell if the encountered issue is due to this or not.
You won't get updates using
sudo apt-get update && sudo apt-get upgrade in contrary of the next method.
So if you actually really used this method, first of all uninstall the deb package using:
sudo apt-get remove skype
From the Ubuntu partner repositery (the recommended method)
If had not, please read the last paragraph of the previous subsection about uninstalling your current Skype package.
This is the preferred method because it supports better your Ubuntu version. I'm actually using this on Ubuntu 14.10 64-bits.
sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner" && sudo apt-get update && sudo apt-get install skype
Please let know if it has fixed your bug or not.
Source: Ubuntu-fr wiki (french)