Probably fte has some map bounds limits somewhere in the code. Infact, earlier, I was testing a map compiled with a custom version of both NetRadiant and Q3map2, created by me to displaye huge maps.
Anyway previous fte version (4802) crashed even on Focal Point sock's q3 map so, it was a real problem, not just a whim of mine!
Now I've just a little problem with quakec (second client "possesses" first client movements and first client screen goes crazy) but I'll figure it out in few days!
The only thing to understand now (engine side) is why a local server started locally with protocol name -ftesimple is not shown in the servers list. I'll do some tests: fist test - I'll upload a fte server on a web server of mine and let's see if fte can see it!
Thanks a lot Spike for your great contribution!