key parameter in method definition causing problems

When I upgraded from 6.x-0.15 all functions that had key parameter set to TRUE stopped working.
(I have key authentication and Use sessid turned on.)

Here is an example:

// My function
array(
'#method' => 'ri.myFunction',
'#callback' => 'mymodule_myfunction,
'#access callback' => 'mymodule_myfunction_access',
'#file' => array('file' => 'inc', 'module' => 'ri_service'),
'#key' => TRUE,
'#args' => array(
array(
'#name' => 'param1,
'#type' => 'string',
'#description' => t('Param1.')
),
),
'#return' => 'array',
'#help' => t('Gets stuff.')
),

If finally figured out that the problem was that somehow, setting the key parameter to true still makes Services think it is false.
Since default value for the key parameter is TRUE, I solved the problem by removing the parameter altogether. Now, only the functions that should NOT use the key have it.

A more general note - and hoping not to sound as a spoiled brat - I wish that the documentation regarding authentication was more up to date, because now it is really confusing.

Thanks for all your great efforts!