Version:           2.1 (using KDE 4.1.2)
OS:                Linux
Installed from:    Ubuntu Packages

When running mutt in konsole, the right side of the menubar is frequently overwritten and requires a ctrl-l to re-appear.

For example, the status bar is positioned as the second to last line in the konsole window:

|  q:Quit  d:Del  u:Undel  s:Save  m:Mail  r:Reply    H:Help                 |

The background between the pipes is blue.  When switching from one mode to another, or scrolling through messages the menubar is "overwritten" such that it appears something like this:

|  q:Quit  d:Del  u:Undel  s:Save  m:Mail  r:Reply    H:Help    |

Again the area between the pipes remains blue, but some remaining horizontal space after the 'p' in Help has gone black.

The obvious solution is to change my menubar background color to black.  But old habits are hard to break. :)

I'm unable to reproduce this in any other application.  However, this does problem does not occur when using xterm.  It does continue if I ssh into a kde3 box and run mutt from there using the 2.1 version of konsole.

Add this to your .muttrc:
color status yellow blue