OpenSUSE 12.2. has Yate-Qt 4.1 in the repository. So that is the version tested. I have a working Asterisk and my main goal was to get a IAX capable client on my labtop so I can call home when on the road. SIP is often problematic when behind a enemy firewall .
Install and setup was no problem and I really liked the clean, fast and simple interface. I had success in dialing out with voice working both way. I was starting to really like Yate-Qt
Next I tried to dial in and sure enough there was a ring-tone from the labtop speaker. I hit Answer .. and got: "Failed to open audio"
Later I found out that when dialing out I also had to made sure nothing else was using the sound system. I think that yate cant receive calls because it itself is using the sound card for the ring-tone.
You guys really should support pulse audio, it would make your client usable.