As is usual with mysterious "permission denied" errors, SELinux was the underlying cause. ...
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as
ID Status▲ Resolution Sev Product▲ Comp▲ Assignee▼ Reporter Summary
11611 NEW --- nor Sisyphus kdebase- nobody cas Не сохраняет MimeType для изменённой ссылки на приложение

File a new bug in the "kdebase-kcontrol" component of the "Sisyphus" product