Subversion - Requested report is unknown

Hi all,

I'm using the latest version of IDEA 5.0.1 and Subversion but whenever I
try to run any of the compare functions (Compare with same version, Compare
with last version, Compare with .. etc.) I get something like the following
message:

Error: svn: REPORT request failed on '/svn/repos/code/!svn/bc/4153/java/egms/war/style/egms.css'
svn: svn: The requested report is unknown.

As far as I know this has been going on since the EAPs, but isn't reported
in the forums or the jetbrains jira? Is message down to some local/subversion
incompatibility? The other subversion functions seem to work.

- Richard