Project building and svn:ignore properties

I trying to use subclipse on projects I already add under subversion. I
had no trouble to do this (BTW: the automatic detection of the .svn
dirs rocks) but I add a serious problem when trying to build the
project.

My project use the default "bin" output folder. Since I didn't want to
put the compilation results under subversion I decided to add "bin" to
the svn:ignore property for the top dir. After migrating under
subclipse, my project cannot be build any more due to "Problems
encountered while deleting resources". Looking at the SVN console I
found the following message:

***
delete /home/moi/prog/java/BROS/core/bin/net
  Path is not a working copy directory
svn: '/home/moi/prog/java/BROS/core/bin' is not a working copy

So eclipse is trying to use subversion to clean the build directory
instead of deleting it directly.

Is there any known workaround ?

-- 
Le cinéma en Lumière : http://www.lumiere.org/