I'm not sure if this is the right forum for a bug report, but I just solved one that has been bugging me for ages. Of the six key commands to hide and reveal the various panels, only five work, and now I know why.
Apparently the 'Results' panel used to be the 'Output' panel? I found some outdated docs that mentioned Crtl + Alt + O to open/hide the Output panel. Sure enough, the reason Ctrl + Alt + R doesn't work in the current version is that, in spite of what the menu text says, it's O that is still mapped to that panel, and not R.
I only discovered this after making sure none of my other installed apps were stealing that key combination. Thank you, process of elimination.