From: Casper Hornstrup
 It is likely that you have a modified working copy. The
 problem is documented here:
 
http://www.reactos.org/wiki/index.php/Subversion#Svn_update_says:_object_wit
h_the_same_name_already_exists
  From: Thomas Weidenmueller
 This only works if the directory to be deleted doesn't
 contain modified versioned files or additional
 files/directories (such as GNUmakefile etc). 
Ahhh, thanks guys. It's probably GNUmakefile in my case.
Ge van Geldorp.