E.g. the repository has /trunk/dirA, without mergeinfo anywhere below /trunk. In a working copy on /trunk do:
svn copy ^/trunk/dirA dirB
Now dirB has mergeinfo that is not helping in any way.
If you do instead:
svn copy dirA dirB
dirB gets no mergeinfo. But that is probably related with the note about
WC -> WC copies explained by "svn help copy".
-- Stein
