Hi,
I just downloaded the Linux version. I would like really to thank you for the great effort.
Regarding this version, IK inheritances features seems missing (Anchor feature was quite cool) . I don't know whether its intentional or not. Animation timeline seems a bit squeezed. Generally the font size seems larger than space available, the UI needs some polishing.
Also, when right clicked on a key-frame, two interpolators appear (linear and instant), though instant doesn't function. Moreover, after creating then deleting bones, corresponding keyframes and entries in animation panel remain.
I hope that other interpolators for animation will be released soon.