1. Hitting backspace in a spoiler doesn't remove it on IE This seems to be a CKEditor issue. I can reproduce the same behaviour by using the "Special Container" option from the "Styles" dropdown in the CKEditor demo . I have filed a bug report with them: https://dev.ckeditor.com/ticket/13120
2. The spoiler is open by default I am not sure why the spoiler would be open by default for you, but it sounds like there is bad auto-save data. Please submit a support request, mentioning this bug report, so that we can investigate further.
It should return them to the group they were in before purchasing. If you're experiencing issues, I would recommend contact support so we can take a look. I am not aware of any issues with that feature.
Of course Pretty much all URL handling in IPS4 is handled by the \IPS\Http\Url class which is super-clever at figuring things like that out. The code to call the URL you specify is: $url = \IPS\Http\Url::external( $row['url'] )->setQueryString( 'version', $row['current'] );
$response = $url->request()->get()->decodeJson(); In applications/core/tasks/updatecheck.php