Error running Orbit pages samples

[David Crayford <dcrayford@...>]

I'm getting the following error when running any of the Orbit pages 
samples. Any pointers to how I can resolve this would be much appreciated.

There was an error in the specified application. The full error message 
follows:

attempt to yield across metamethod/C-call boundary
stack traceback:
	[C]: in function 'yield'
	[string "  local app_name, bootstrap_code, is_file =..."]:29: in function 'read'
	/usr/local/share/lua/5.1/wsapi/request.lua:130: in function 'parse_post_data'
	/usr/local/share/lua/5.1/wsapi/request.lua:225: in function 'new'
	/usr/local/share/lua/5.1/orbit.lua:503: in function 'make_web_object'
	/usr/local/share/lua/5.1/orbit.lua:537: in function
	(tail call): ?
	(tail call): ?
	[C]: in function 'xpcall'
	/usr/local/share/lua/5.1/wsapi/common.lua:264: in function 'run_app'
	[string "  local app_name, bootstrap_code, is_file =..."]:67: in function <[string "  local app_name, bootstrap_code, is_file =..."]:64>