Are you able to rotate the view into 3D by Alt dragging on it? I understand from Dave that the Alt key is not available for application use in many Linux systems. We worked out a solution to use the Windows key as the modifier.
If you need this fix, download the attached version of uirender.cpp and replace the one you have with it. This has a conditional compile that uses the Windows key for 3D rotation just for Linux.
Also, where did you download the 0.8.22 code from? I have the code because I’ve been contributing to it but I’m not sure which exact version was made publicly available and from where.