I just upgraded a site to silverstripe to 2.4.2 from earlier 2.3 version and the blog module to 0.4.1. The site already had a latest blog summary been shown in its home page. After upgrading the formatting in the latest blog summary has been lost.
The same issue had occurred in the blog page, but was solved by disabling wysiwyg editing at mysite/config.php [BlogEntry::$allow_wysiwyg_editing = false;]
All the help is appreciated.