I have had a lot of problems after upgrading from 13.04 to 13.10 including sound etc. which I was able to solve but the newest now is that the network-manager doesn't see any of my network devices, although wlan0 and eth0 can be queried and their properties can be set using ifconfig. When going to the network settings from the system settings menu I also get the message that the system services are not compatible with this version.
I really need help with this though I might simply install an earlier version of ubuntu soon.
On a side note I am disappointed to see that ubuntu is getting more and more problematic ever since version 10. But that is my personal opinion.