[xwiki-users] Delete Spaces with broken Umlauts

Hi everyone, somehow I created Spaces with broken Umlauts like: Gesch�������¤ftsf�������¼hrung or Gesch�¤ftsf�¼hrung see screenshot: https://dl.dropbox.com/u/10128532/Schnappschuss%20%282012-12-13%2013.29.05%2... I cannot delete those. They are empty but after deleting from the spaces menu they still stay in the Spaces-Lists (i.e. on the Dashboard). Is there any way to get rid of them manually (Using Tomcat/MySQL) Thanks a lot! Ole