paulvdh:
I just did a short text and when placing text on the B.Fab layer, it is by default shown mirrored, while on F.Fab it is by default not mirrored. And this is as what I would expect. These Fab layers are intended for fabrication notes, so for the back, a printed version (with the text readable) will coincide with looking at the PCB from the back side.
Gerber files should never ever be mirrored. The option for mirroring is also disabled during gerber file creation as it should be. Default for gerbers for all layers is the “front” view of the PCB.
Yes, to both of the above. there is nothing wrong with the F.Fab or B.Fab layers, text appears as expected, “flipping” works as expected both in PCBnew and for gerbers.