Since no thread was created here with the same problem, maybe the problem is on my side so I need some opinion/s regarding this. (Will locked the thread after getting enough response).
I think less than 2 hours ago (around 2-3pm forum time), Im having a difficulty breaching the login captcha although the inputs was correct. It most occurs on the PICK ALL IMAGES option (damn that traffic signs lol). There is also a problem on the option of SELECTING ALL IMAGES UNTIL NO ONE SHOWS because the image is so slow when reloading. I think I managed to get in after 15 tries.
Internet connection = Fine
Cleaning browser data = Done
"damn that traffic signs" lol.
I know what you feel as it happened to me I think last month when I logged my bitcointalk account to my cousin's house so basically different ISP from what it's used to be. And even you click the correct inputs still they're giving you an error. And then when I changed it to the Select All Images etc. like you are saying, the boxes are slowly loading the content so it takes time.
With those Pick All Images , I able to pass it by clicking less signs boards. Yes it will work.
With those Select All Images until no one left, well no choice but to wait.
I think you just faced the recaptcha problem server thing at the time you logged in (as mentioned above at one of the replies) and yes ISP might played a role there. No worries, it doesn't happened regularly.