Stuart Silvester

This is not an IPS bug. It’s a bug within PHP itself. Meaning you could have had a perfectly working installation and then upgraded your version of PHP and it magically broke without you doing any update. 

Even outside of that however ANY complex piece of software will have issues. There are literally hundreds of thousands of interdependencies and it is impossible to test them all without doing releases only every few years. Even then you’ll miss stuff. Look at major operating systems for example. 
This is one of the reasons to use software that is well supported and maintained. 

It looks like you may have an issue with your JS loading. Try going to AdminCP > Support > click clear caches.
Hopefully everything should start working after that.

We've been looking further into this today, it appears that a bug "fix" in PHP 8.0.22 & 8.1.9 has caused some issues - https://bugs.php.net/bug.php?id=80047 
I suspect this unannounced breaking change may cause issues in other software packages. The bug report suggests this change was actually intended for PHP 8.2 but was committed to 8.0/8.1 anyway.
We're working on a solution. I do not know at this time whether PHP might roll it back in the next release or not so we'll do something to work with either situation.

Hey @D-Trox
This is an issue specific to PHP 8.1 and we've got a fix coming for it in an upcoming release.

We've been looking further into this today, it appears that a bug "fix" in PHP 8.0.22 & 8.1.9 has caused some issues - https://bugs.php.net/bug.php?id=80047 
I suspect this unannounced breaking change may cause issues in other software packages. The bug report suggests this change was actually intended for PHP 8.2 but was committed to 8.0/8.1 anyway.
We're working on a solution. I do not know at this time whether PHP might roll it back in the next release or not so we'll do something to work with either situation.

Hey @D-Trox
This is an issue specific to PHP 8.1 and we've got a fix coming for it in an upcoming release.

We've been looking further into this today, it appears that a bug "fix" in PHP 8.0.22 & 8.1.9 has caused some issues - https://bugs.php.net/bug.php?id=80047 
I suspect this unannounced breaking change may cause issues in other software packages. The bug report suggests this change was actually intended for PHP 8.2 but was committed to 8.0/8.1 anyway.
We're working on a solution. I do not know at this time whether PHP might roll it back in the next release or not so we'll do something to work with either situation.

The bug report is still open, we've looked further into it but haven't got a fix ready for it yet.

It sounds like an editor setting has been changed.
Go to AdminCP > Customisation > Editor > Settings. Change "Return Key Behaviour" back to "start new paragraph".

I think it’s the old bug and that the files were missing all the time, given that the file is flagged as compatible with 4.3-4.4 and that it had no further updates since then.

It sounds like an editor setting has been changed.
Go to AdminCP > Customisation > Editor > Settings. Change "Return Key Behaviour" back to "start new paragraph".

URLs don't always have to redirect to their canonical version, that's why the canonical link element exists, and both of those examples are using it correctly.

It will only show you resources that are compatible with your current version.

A patch isn't needed, the issue was fairly specific to your community and maybe a handful of others. The issue has been fixed for you. We'll work further on the underlying cause to prevent it occurring in future.

A patch isn't needed, the issue was fairly specific to your community and maybe a handful of others. The issue has been fixed for you. We'll work further on the underlying cause to prevent it occurring in future.

Thanks so much for doing that for me!!!!

A patch isn't needed, the issue was fairly specific to your community and maybe a handful of others. The issue has been fixed for you. We'll work further on the underlying cause to prevent it occurring in future.

A patch isn't needed, the issue was fairly specific to your community and maybe a handful of others. The issue has been fixed for you. We'll work further on the underlying cause to prevent it occurring in future.

A patch isn't needed, the issue was fairly specific to your community and maybe a handful of others. The issue has been fixed for you. We'll work further on the underlying cause to prevent it occurring in future.

We're using a custom theme, we need to make a few adjustments.
It looks like this in the default theme

Are you talking about a specific view?
The topic listing will show them like this...

In the topic itself, it has an icon at the top (the same way we do for hidden, unapproved, featured, pinned etc)

As @Jim M notes, you can also overload \IPS\convert\Software\Core\Xenforo::fixPostData() with a plugin to manipulate the text before it is sent through our parser. If you have a look there, you'll also see the various things we change in the text before we parse it.

As @Jim M notes, you can also overload \IPS\convert\Software\Core\Xenforo::fixPostData() with a plugin to manipulate the text before it is sent through our parser. If you have a look there, you'll also see the various things we change in the text before we parse it.

The pre-selected option is contextual depending on the page that the user is viewing. This is very similar to how it used to work in 3.x and early versions of 4.x.
It's simply exposing the content types available on the advanced search page (of which only one can be selected), so they're more accessible from all pages - https://invisioncommunity.com/search 

We're using a custom theme, we need to make a few adjustments.
It looks like this in the default theme