[Trac] How to resync commit message after svn propchange?

[Norbert Unterberg]

I have the following problem with Trac:

After checking something in with subversion, I changed the commit 
message using
   svn propset svn:log --revprop

But the Trac source browser still displays the old log message. Even 
using the trac-admin resync command does not update the log message.

Is there any way how I can do this? What does trac-admin resync do if 
not updating the database from the subversion repos?

Norbert