gnome-panel crashing on hoary

[Johan Meskens CS3 jmcs3]

ubuntu 5.04
gnome 2.10.0

hello


i tried to change my font preferences
  , system->preferences->font

after i did
  gnome crashed
  gnome-panel crashed
and i lost control over the lower panel
  no more possibility of adding to the panel with gnome-panel crashing

i lost reveal-desktop
and the presence of the icons of open windows on the lower panel
  , which is kind of a nuisance


is there a way of returning to the default settings of gnome-panel ?
  , maybe some conf*.xml files got messed up ?


how can i add these lost functionalities back ?
how can i add the trash icon
               the reveal desktop
               the workspace switcher     to the upper panel ?


thanks for your time
jmcs3