Bugzilla Bug 92923

Rather than making people jump through the hoops of a pretty buggy 1.9.10, it
looks like it's best to skip that one, and go straight to 1.9.11 that's just
been released a moment ago.

Changes: 

    * The bug that Return, Space and Delete key were ignored when
      multiple messages were selected was fixed.
    * A compile error was fixed.
    * The selection problem after the change of the contents of the
      summary was fixed.
    * The bug that prohibited the resizing of the summary columns was
      fixed.
    * The bug that the summary view couldn't be scrolled after
      expanding a thread at the bottom of the view was fixed.

and the earlier changes already in 1.9.10:

    * The summary view was reimplemented using GtkTreeView.
    * The performance of the update of the statusbar was improved.
    * The CRAM-MD5 is preferred now on IMAP4 automatic authentication.
    * Messages selected with 'View/Go to' will not open now if the
      message view is hidden.
    * The default message font was changed to Monospace 12.
    * A redraw problem of the text view on smooth scroll was fixed.
    * Several bugs of the folder view were fixed.

Fixed in CVS. Thank you for reporting!