Version: (using KDE KDE 3.5.5) Installed from: Ubuntu Packages When you select multiple messages (CTRL+click) each one is opened. This is especially annoying when accessing an IMAP folder as it must download each one. It seems the most common reason to select multiple messages is to delete them (especially with spam). The default behaviour should be to just select them in the message list and leave the preview pane empty. That way users don't have to download (and view) spam or other unwanted messages.
It might make sense to not download the body just when CTRL-clicking, but this is a wish, not a bug.
*** This bug has been marked as a duplicate of bug 36796 ***