Version conflicts to be aware of
Ubuntu 8.10 (Intrepid Ibex) now ships with Subversion 1.5
You can't use a svn 1.4 client and a svn 1.5 client on the same working copy.
While the subversion integration in Eclipse is great I still prefer to do some things on the command line and some with kdesvn.
Then you need to upgrade your subclipse plugin to subclipse 1.4
If you can - then upgrade to Eclipse 3.4