Can't confirm:

System information

3.8.4-dev
Multilanguage Site (4 Lang.) & Test English (GB) Sample Data
macOS Sierra, 10.12.6
Firefox 57 (64-bit)

MAMP 4.2

• PHP 7.0.22
• MySQLi 5.6.35

@franz-wohlkoenig - Try adding the quote in the actual Alias field as opposed to having it automatically geneerated rom the title.

@C-Lodder done: copied "this-is-a-“test”" in alias and save got in Alias "this-is-a-test".

Can not confirm

I entered this

And on save it was sanitized as this

@franz-wohlkoenig / @brianteeman I assume you're both on Apache as opposed to IIS

Added a bit more info to original post.

I just tested on a completely different website (Joomla 3.8.3) and host (which uses Linux and Apache, PHP 7.0.26) and the same thing happened...

I was assuming it was and IIS only issue but this now appears not to be the case.

Also this was happening on previous versions of Joomla.

Do you have any plugins installed - perhaps for seo?

@C-Lodder

System information

3.8.4-dev
Multilanguage Site (4 Lang.) & Test English (GB) Sample Data
macOS Sierra, 10.12.6
Firefox 57 (64-bit)

MAMP 4.2

• Apache-Server
• PHP 7.0.22
• MySQLi 5.6.35

Both sites have components and plugins installed. Some well know ones like JEvents which I am sure do some SEO but I assume it would only affect their own component.

The only 3rd party component that I can think of that both sites have installed is the JCE Editor.

Sorry I have no idea. It clearly doesnt happen in the joomla core as we havent been able to replicate it so it must be an extension

closed as no Core-Issue.

@eSilverStrike Please ask further help on the forums.

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/19120

Okay thanks.

Enable "Unicode Alias" in the global configuration, and you can reproduce it.

Reopening.

Good spot @Bakual

Issue confirmed. Thanks for Hint, @Bakual

However I don't get a 404. Maybe because I have only legacy routing active.

Confirmed as well. Issue happens when I have Unicode Aliases enabled. If disabled the curly quotes are removed from the alias.

@eSilverStrike do you have Modern routing enabled or legacy?

Legacy is enabled.

I just tested this issue. I think the problem is solved.

1. I have set unicode alias and am using legacy routing.
2. I have created an article with title this-is-a-“test”.
3. I did not receive a 404 error message in the front end. I could open the article.

@eSilverStrike Can you confirm that the problem is solved?

@astridx and with modern routing?

For me, modern routing is also OK in the front end with and without id.
Which only surprises me. The IDs are displayed both times. I am not yet familiar with routing and therefore do not know whether it is related to other settings.

Curly quotes, like any UTF8 characters, are transformed to percent encodings when unicode alias is set.

IN the browser it looks like

But the real result is in this case is en/catblogenglish/testarticle-with-%E2%80%9Ccurlyquotes%E2%80%9D

Closing as not a bug.