After more than a month of using the 1.7.2 version I have to say this is the most stable release I had since 1.4.x. It just keeps running, memory and CPU footprint are low for the core ZWave stuff. I had some load issues with the home automation, but disabled that because I already had written my own. I have 4 razberries with a lot of devices each.
To me stability is the key feature for anything that should run in your house invisibly. I hate reboots.
So, thanks guys.