TypeError with Play 1.1 beta2

[roymax]

play scaffold:gen ~ _ _ ~ _ __ | | __ _ _ | | ~ | ' | |/ ' | || || ~ | /|_|__|__ () ~ || |*/
~ ~ play! 1.1-beta2, http://www.playframework.org ~ framework ID is roy ~ executing command: scaffold:gen Traceback (most recent call last): File "/opt/local/bin/play", line 106, in cmdloader.commands[play_command].execute(command=play_command, app=play_app, args=remaining_args, env=play_env, cmdloader=cmdloader) File "/opt/local/share/play-1.1-beta2/modules/scaffold-head/commands.py", line 25, in execute run(app, args) File "/opt/local/share/play-1.1-beta2/modules/scaffold-head/commands.py", line 30, in run subprocess.call(java_cmd, env=os.environ) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 444, in call return Popen(_popenargs, _kwargs).wait() File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 595, in __init errread, errwrite) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 1106, in _execute_child raise child_exception TypeError: coercing to Unicode: need string or buffer, list found