In order to get a copy of the latest version of Transposh wordpress plugin in Transposh svn use the following command
svn co http://trac.transposh.org/svn/transposh/trunk/WordPress/plugin/transposh
You can check it out with different SVN clients as well.
Creating a clean version
After checking out, this version will work, however you can create a "cleaner" version using the build.sh script
./build.sh <version> [debug] [zip] [targetdir]
./build.sh 1.0 debug zip /var/www/localhost/htdocs/wp-content/plugins/transposh
The debug parameter states if debug functions will be stripped out, the zip will create a zip file (compatible with wordpress.org one) in the /tmp directory