Setting property on non-local target

Hi,

my command line client says

$ LANG="C" svn propset property "text" URL
svn: Setting property on non-local target 'URL' not yet supported

$ svn --version
svn, Version 1.1.4 (r13838)

Any idea when this will be supported? It's an important feature here:
setting a property in the main directory of the repository is impossible
for large projects with many branches and tags otherwise.

Are there any other clients supporting this?

regards,

-- 
Lutz Frommberger
SFB/TR 8 Spatial Cognition - Project R3-[Q-Shape]
Cognitive Systems Research Group, Universität Bremen
http://www.cosy.informatik.uni-bremen.de/staff/lutz/