I have a situation here... I'm using Freeciv 2.5.8 (win sdl client) and in some point Leonardo's workshop gets obsolete. I thought was a bug at discover Electrocity because it had happend before but I've just came back two turn back with a saved game and again the same after two turns...
This time I was looking every step of the tech research and being sure I don't research Automobile by mistake... and I didn't... Take a look in the screenshots (in spanish, sorry) where I can confirm I didn't even developed nothing directly related with the Automobile (like Combustion nor Steel). And I've said *almost* because it happens two turns before discover electricity...
Thanks!