When trying to run skype on my Gentoo Linux I got this error:

floating point exception

Nothing else, just that. Need to say that in order to see why skype was not starting, I had to start it from the console, so I could see the output messages.

After googling a little, I found this solution, that I do not fully understand, 'cause I am just starting with Gentoo, but it worked just great!

As root run this:

echo net-im/skype qt-static >> /etc/portage/package.use

And then reinstall skype

sudo emerge skype

This will make skype work the next time, If some of you know why this happens, and this operation solve it, lets comment about it, please.