Upgrading TortoiseSVN, or the command line Subversion package, will not upgrade the Subversion level used by Eclipse. You'll have to update the subclipse or subversive to get Eclipse updated. By the way, I you haven't installed this year's Eclipse
IDE (Luna), you might just want to do that, I know that the subclipse that gets installed into it uses a very recent local Subversion directory layout (I had to upgrade my command line tools and update all of my projects to get everything at the same level).