mesh edges not aligned when exporting Closed

 From:  GioCa
3869.112 
Being a newcomer in these forums I didn't want to jump in, but after following this thread for a few days let me just praise Michael's composure in a discussion that might have stopped at post n.85 (or even before).
Reading some posts I had the feeling that people is speaking different languages or just refuse to understand. Meh!