Window list: minimized windows change size all the time

Thanks for your bug. That's known upstream: http://bugzilla.gnome.org/show_bug.cgi?id=310809

the bug is fixed upstream now

 libwnck (2.19.5-0ubuntu1) gutsy; urgency=low
 .
   * New upstream version:
     Features
     - Install wnckprop utility
     - Add tooltips for workspaces in the pager
     - New wnck_screen_get_workspaces() API
     - New wnck_workspace_get_layout_row(), wnck_workspace_get_layout_column()
       and wnck_workspace_get_neighbor() API, to get layout information about a
       workspace (Vincent)
     - New wnck_workspace_get_screen() API
     - New wnck_window_is_below(), wnck_window_make_below() and
       wnck_window_unmake_below() API
     Deprecations
     - Deprecate wnck_screen_get_workspace_index(). wnck_workspace_get_number()
       should be used
     - Deprecate wnck_screen_calc_workspace_layout(),
       wnck_screen_free_workspace_layout() and WnckWorkspaceLayout
     - Deprecate wnck_screen_get_workspace_neighbor().
       wnck_workspace_get_neighbor() should be used
     - Deprecate wnck_tasklist_set_minimum_width(),
       wnck_tasklist_get_minimum_width(), wnck_tasklist_set_minimum_height(),
       wnck_tasklist_get_minimum_height(). They are useless with the new sizing
       algorithm
     Fixes
     - Improve a bit drawing of the pager
     - Fix logic when cleaning up after dragging a window from the pager
     - Use the last allocation of the tasklist as a basis for the fake allocation
       used to compute the size hints. This gives better results.
     - Rationalize the using of icon names/names in the tasklist and the pager
     - Do not put state indicators in the tooltip text of tasklist buttons
     - Fix compilation of wnckprop
     - Import minor fixes from the XFCE fork (small leak, and safety checks)
     - Code cleanups
     - Use g_type_class_add_private() everywhere
     - Use GSlice when it makes sense
     - Probable fix to show windows needing attention not shown in the viewport
     - Make wnckprop able to change properties of windows and screens
     - Make wnckprop translatable
     - Redraw a workspace in the pager when the state of a window changes and is
       relevant
     - Stop the glowing effect in the tasklist for urgent windows after a while
       (LP: #28757)
     - Add new fade-max-loops to control the number of loops before the glowing
       effect stops. Makes it possible to nearly disable the effect.
     - Don't draw dots for group buttons in the tasklist, but use gtk_paint_tab()
     - Make the glowing effect in the tasklist use cairo. This also makes it work
       with RGBA.
     - Makes it possible to drag a window from a grouped task menu of the tasklist
     - Never group together in the tasklist windows without a class
     - Add new mode to wnckprop to interact with a workspace
     - Add new modes to wnckprop to interact with a class group or an application
     - Improve wnckprop command line arguments
     - Add some XSync calls where needed in libwnck for wnckprop to work
     - Make wnckprop use the real X server timestamp when needed
     - Fix size of buttons in tasklist changing with the text. This should be an
       important usability improvement.
     - Fix image of tasklist buttons floating outside of the bu...