Version: 1.9.1 (using KDE KDE 3.5.0) Installed from: Ubuntu Packages OS: Linux I start with this setup: "Prefer HTML to plaintext" set globally in Settings->Security->Reading. The option is not set on the IMAP folder in question. Now, some HTML mails are displayed as plaintext, other as HTML. The one that is displayed as HTML has a chunk of HTML in it as well. Now I set the folder specific option "Prefer HTML to plaintext" and all works ok (HTML messages displayed as HTML, and text as text)
Cannot reproduce in recent KDE 4.3 kmail