~snip~
Maybe I will try to reset my computer, the entire windows just to be sure that any other application is not blocking anything. Before that I need to find some free time :-D
@AB de Royse777, do you have any new details regarding your problem? You should always take into account that something else can have an impact on Tor, but the only thing that comes to mind is to look in the settings of your antivirus/firewall and maybe restart your modem.
Can you explain in a little more detail how to see through which CF servers the traffic goes - and are there any settings that @AB de Royse777 can try to overcome the problem?
You should be able to see the alt-svc header in the get request for the initial load of Bitcointalk.org. This should be automatic and I'm not aware of any settings that can overwrite this. If you're consistently encountering that CAPTCHA challenge, then I'm inclined to think that it would be some other issues. Without knowing how exactly it is setup, I'm afraid I can't provide much inputs over here.
Clearing cache, refreshing circuit and changing the security level are things that I would recommend trying.Honestly, I'm not really an expert in such technical things, but I played a little with
"Inspect (Q)", which shows a lot of information about the page you are on, and there is a
"Network" tab, among other things. I don't know if any of this information can help to detect the problem, but I assume that it could be of some help.