Hi Danny, ok I can reproduce it now, that looks like a post pick bug.

It has to do with the selection conditions for extrude - extrude is looking for curves (or edges) or faces (or single-face breps) as the inputs, but it does not accept general multi-face "whole object" breps. So when you go click on a face it stops right there and accepts just the face as the selection target rather than selecting the whole object.

I'll look into fixing this, but this one may be a bit tricker than the other one.

Basically because the Extrude command is not looking for general full objects it sort of automatically drills in right away instead of letting the top level object get selected. But because when you click on a brep you are really initially clicking on faces (just because those are the things that make up the real "meat" as far as screen coverage of the brep) the auto-drill-in only happens for faces.

Or at least I think it's something along those lines, I will need to investigate a bit more.

- Michael