You can download the patch from the bug (http://ez.no/content/download/74883/298313/file/webdav_utf8.tar )
That's a tar file. As you don't have the same version of ez than the patch, simply edit the patch files and applies the modifications by hand. That's simple modifs and shouldn't be too complicated.
FYI, Dmitry from ez is fixing it on svn, should come out soon.