about xeyes and window decoration

Hi all,
  First of all  I'm not an expert on X-Window systems, so sorry if this 
question sounds dumb :). I'm thinking about writing some arbitary 
shaped X-application using XShape exension and I looked at 'xeyes' as 
an example. I found that although space around 'xeyes' are transparent, 
it actually has window dedorations (e.g. title bar and border) on my 
Slackware9 Gnome 2.2 machine (I did use "-shape" command line option 
to enable the XShape exension). However, on my gentoo-2004.0 KDE3.2
machine it doesn't has window decorations. I would like to why there
is such a difference and how can I force XShape applications to always
have no window decorations?

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