ich hatte zuerst auch probleme damit, aber habe dann "own_window" von no auf yes und "own_window_type" von override zu desktop geändert. Dann gings.
#avoid flicker
double_buffer yes
#own window to run simultanious 2 or more conkys
own_window yes
own_window_transparent true
own_window_type desktop
#own_window_type override
own_window_hints undecorate,sticky,skip_taskbar,skip_pager
own_window_colour 000000
maximum_width 1280
#borders
draw_borders no
border_margin 3
#shades
draw_shades no
#position
gap_x 0
gap_y 3
alignment top_left
#behaviour
update_interval 1
#colour
default_color cecece
color1 efefef
#default_shade_color FFFFFF
#font
use_xft yes
xftfont dejavu sans:pixelsize=12
#xftfont terminus:pixelsize=14
#to prevent window from moving
use_spacer no
minimum_size 1280
#mpd
mpd_host localhost
mpd_port 6600