well, although i don't know what one might mean by "the whole region", but I'm experiencing the exact problem with the forum, while connecting from Greece and a Greek ISP.
i connect to the Internet through my desktop, on which the router is attached through a cable. i have also created a home wireless LAN, and i use a laptop to go on line through that. i use chrome and avast (completely same versions) on both machines. the problem that occurs is that on the PC, i cannot access the forum through chrome or IE, but i can through opera. chrome produces the message BulmaSoft has uploaded with the same explanation/details, while IE gives the "cannot display page" message. i think that this behavior has appeared more or less the same period - no longer than two months ago.
I've been on this problem for a few days now and , to cut a long story short (to not mention workarounds I've tried to no avail), i have discovered this:
i have no problem accessing the forum through the laptop. and now for the somewhat creepy details. i exported the certificate on my laptop and copied it to my PC, both through the wireless and by USB flash.
outcome: the exact same certificate is accepted on one machine (laptop) and rejected on the other (PC). the only difference i observed is that the valid signature algorithm (Sha256RSA) changes to 1.2.840.11.... on transfer.
i would say that this is not a local problem (country, ISP) but also it is (the machine).
Any ideas?
PS. I've used avast for years and i trust it, although i can't say the same for chrome - it's the relation with IE too.