In ubuntu karmic, minimize doesnt shade icons and causes crash message

Do you get any error messages if you run dockbarx in a window?
In the terminal type:
dockbarx.py run-in-window

Yes, I run ockbarx as you said and minimized, then maximized, and then minimized again a window, and this is the log from the terminal:

/home/belen/.themes/aero-clone/gtk-2.0/toolbar-custom.rc:21: Imposible encontrar un archivo imagen en pixmap_path: «Toolbar/toolbar-black.png»
/home/belen/.themes/aero-clone/gtk-2.0/toolbar-custom.rc:24: Background image options specified without filename
/home/belen/.themes/aero-clone/gtk-2.0/gtkrc:187: Imposible encontrar un archivo imagen en pixmap_path: «Arrows/arrow-up.png»
/home/belen/.themes/aero-clone/gtk-2.0/gtkrc:191: Overlay image options specified without filename

** (dockbarx.py:4710): WARNING **: Trying to register gtype 'WnckWindowState' as flags when in fact it is of type 'GEnum'

** (dockbarx.py:4710): WARNING **: Trying to register gtype 'WnckWindowActions' as flags when in fact it is of type 'GEnum'

** (dockbarx.py:4710): WARNING **: Trying to register gtype 'WnckWindowMoveResizeMask' as flags when in fact it is of type 'GEnum'
dockbar init
/usr/bin/dockbarx.py:795: DeprecationWarning: PyArray_FromDimsAndDataAndDescr: use PyArray_NewFromDescr.
  for row in pixbuf.get_pixels_array():
Traceback (most recent call last):
  File "/usr/bin/dockbarx.py", line 1174, in window_state_changed
    if wnck.WINDOW_STATE_MINIMIZED & changed_mask & new_state:
AttributeError: 'module' object has no attribute 'WINDOW_STATE_MINIMIZED'
/usr/bin/dockbarx.py:747: DeprecationWarning: PyArray_FromDimsAndDataAndDescr: use PyArray_NewFromDescr.
  for row in pixbuf.get_pixels_array():
Traceback (most recent call last):
  File "/usr/bin/dockbarx.py", line 1174, in window_state_changed
    if wnck.WINDOW_STATE_MINIMIZED & changed_mask & new_state:
AttributeError: 'module' object has no attribute 'WINDOW_STATE_MINIMIZED'
Traceback (most recent call last):
  File "/usr/bin/dockbarx.py", line 1174, in window_state_changed
    if wnck.WINDOW_STATE_MINIMIZED & changed_mask & new_state:
AttributeError: 'module' object has no attribute 'WINDOW_STATE_MINIMIZED'

Works OK for me in virtual box now. Please confirm if the fix works.

I confirm it's fixed. I tested it downloading the recently added deb in the ppa. I had to download it cause the deb was only available in the files for jaunty.