But something has changed, there can be little doubt about that. I have previously used Opera with this option set and not encountered problems previously with the sites I use.

A further update. This problem seems to have cleared up now on the problem site. There is some suggestion it could have been due to routing/timing problems over the Internet. Other than that I have no idea.

With my Opera that page looked fine, so I downloaded Opera 36 portable and it also looked fine, this on Windows 7. So then I tried with Opera 36 portable on my XP VM and there you have it: that site looked just like in your screenshot.

I googled for that error in the console and indeed it's related to the SSL certificate. For its HTML content, that site uses a certificate provided by StartCom which uses SHA256RSA, and Windows 7 provides it. XP has a smaller list of trusted certification authorities, and only has the one for StartCom that uses SHA1RSA, but it seems if the newer version is not available, the older one can be used. But for the content (css, js, gif, jpg), which come from img11.warez-bb.org, it uses a certificate provided by Comodo, and that's not present in XP. It seems Firefox has its own list of certificate providers, so that's why it works there.

The Certificates window in XP has an Import button, so there might be a way to import something from Comodo which would let you browse that site without this issue. I wouldn't look for a hack to make Opera disregard unknown certificates, for quite obvious reasons.
I tried exporting the certificates from Firefox and from Windows 7 and importing them in IE but it didn't work. Maybe you can spend some more time and have more luck.

Well, it's the latest on XP OS, can't do much about it, can I?

You can update your OS. If you are going to keep using an obsolete OS, you should take responsibility for your decision.

As for "upgrading" my OS, it's a NO too. I don't need overbloated OSs that don't offer me any REAL improvement to my daily work.

Well, for me just (lack of) security would be a very strong reason to update.

And you say you don't need a new OS until you get in the day where you will no longer be able to do lots of things because you will be using old versions of programs that can't deal with changes in technology.

In fact, you seem to be facing it with Opera.

How Chrome, Vivaldi or other Chromium based browsers behave on that page?

I will never install Chrome or any other clone of it. The only exception I did was to try Opera 36.

As 36 is a old version it really may be missing more up-to-date security protocols.

Well, it's the latest on XP OS, can't do much about it, can I? Except maybe importing latest SSL certificates. As for "upgrading" my OS, it's a NO too. I don't need overbloated OSs that don't offer me any REAL improvement to my daily work. Only because they're newer or trendy that's not enough to be better. Oh yeah, I can't play 25 GB games... big deal...

AFAIK this was not the case in previous releases of Opera. Why this should be so I do not know. Perhaps something has changed on the site?

I would bet on it.

It does seem that, for whatever reason, the latest version of Opera (Ver. 39.0.2256.48) does need the option: 'Block third-party cookies and site data' to be disabled.

That option is disabled by default.

In fact, why would it have something to do with not loading CSS and images??

It's not unusual that those softwares block loading of pages or its elements.

It's Opera's fault. Firefox works.

Since you seem to be the only one with the problem, i would say that the chances of it be Opera's fault may be very low.

How Chrome, Vivaldi or other Chromium based browsers behave on that page?

My guess is Opera fails at SSL protocols.

As 36 is a old version it really may be missing more up-to-date security protocols.

Then, when I set this option back again, to how it had been, the problems did not return.
Err...?

Probably because the necessary data was already downloaded?

Possibly. Anyway, this needs updating.

It does seem that, for whatever reason, the latest version of Opera (Ver. 39.0.2256.48) does need the option: 'Block third-party cookies and site data' to be disabled. Otherwise I get two problems on one website I use - Firstly, very slow loading of pages. Secondly, some site icons do not display correctly, though they still work. (And they display correctly with the 'Open image in new tab' menu option.)

AFAIK this was not the case in previous releases of Opera. Why this should be so I do not know. Perhaps something has changed on the site? Perhaps the option did not really work as intended on previous releases of Opera? Perhaps there is a fault with the latest version of Opera?

But something has changed, there can be little doubt about that. I have previously used Opera with this option set and not encountered problems previously with the sites I use.

We're just trying to help you track down what it is.

How? Telling me there's something wrong on "my setup"? Can you be more specific? Because I have installed Opera 36 for XP to see how it renders websites that don't work anymore in Opera 12.17. Immediately after a default installation of Opera 36, the website suggested didn't work. What a progress...

And all this while Firefox works perfect. Thing is I am not a fan of FF, but I might have to become one because Opera fails me.

It is a matter of SSL for sure (see post above) and by reading other topics I see that Opera team will not address new SSL cyphers.

Opera need a lot more work.

Do you use any anti virus, firewall, anitimalware or similar software? If so, have you checked with it disabled?

I use, obviously. Last version of ESET Smart Security. The same software that protected my PC flawlessly for the last 10 years. I tried with it disabled completely. No difference. In fact, why would it have something to do with not loading CSS and images?? It's Opera's fault. Firefox works.

My guess is Opera fails at SSL protocols. This is a screen capture of debugger console showing multiple errors.

net::ERR_SSL_VERSION_OR_CIPHER_MISMATCH

http://i.imgur.com/xiCVdqE.jpg

Then, when I set this option back again, to how it had been, the problems did not return.
Err...?

Probably because the necessary data was already downloaded?

Opera need a lot more work.

Do you use any anti virus, firewall, anitimalware or similar software? If so, have you checked with it disabled?

To add to the above -
After extensive maintenance on my PC (nothing showed up) I find that the Admin copy of Opera seems to be displaying icons OK. But my normal User copy does not. Also, when Opera last updated I lost my open sessions (Tabs) when I restarted it, in the User account.
Any advice how I can get the User copy back on track?
TIA

I have managed to solve(?) this.

On the site with the problems using my User version of Opera I made them go away, first by removing the setting: 'Block third-party cookies and site data'.

Then, when I set this option back again, to how it had been, the problems did not return.

Err...?

IF it fails in Opera then it probably fails in Chrome and any other browsers that share that renderer. Does it work in Firefox? If it fails there also then its a problem with the site and not your browser.

As I already said, Firefox works perfect where Opera fails (see below).

Chrome & Opera need a lot more work. In fact I still consider as felony Google's takeover of Opera 12.17 project. Google butchered Opera and got rid of a major browser competitor. Why do they need TWO BROWSERS??

http://i.imgur.com/MVvN2i8.jpg

http://i.imgur.com/LcfOyms.jpg

http://i.imgur.com/Uh6jkbO.jpg

After extensive maintenance on my PC (nothing showed up) I find that the Admin copy of Opera seems to be displaying icons OK. But my normal User copy does not. Also, when Opera last updated I lost my open sessions (Tabs) when I restarted it, in the User account.

Any advice how I can get the User copy back on track?

TIA

I have also found the most recent releases of Opera seem to be running increasingly slowly on some sites.

Win 8, 64 Bit

What part?

Most probably the fact that you are using an old version of Opera.

Funny... I've quit Opera 12.17 because some websites don't render correctly, just to find that Opera 36 fails miserably exactly the same...

Using Opera 36? It is reported as being the last stable version...
Or using Windows XP SP3? Because I don't see anything wrong with it. Firefox works perfectly on every website.

Not quite.

Even with uBlock up and running, as the session grows older, it starts having certain trouble with Facebook. I even use my not-so-up-to-date Google Chrome more often.

Then again, Opera's Chromium now... :whistle:

What part?

Most probably the fact that you are using an old version of Opera.

Using Opera 36? It is reported as being the last stable version...

Opera no longer supports XP and Vista. Opera 36 was the last version with support for those systems.

This actually might be the issue. Unfortunately.

What part?

Using Opera 36? It is reported as being the last stable version...

Or using Windows XP SP3? Because I don't see anything wrong with it. Firefox works perfectly on every website.

Yes, I checked. No difference.
Have you checked the address yourself and it renders well??

It seems ok here, at least the first page.

"Might be?" Do you know of any admission of malfunction from Opera team? Or is it just a guess?

Did you notice her badges?

Opera 36 is kind of old version of Opera (current stable one is 39) and there is a considerable chance that it may start facing problems to render pages as the web changes.