Just started developing a plugin and this is where I’ve also got to! I’m using WordPress 2.5.
The Javascript call is made but when the wp_ajax call is forwarded the expression if ( !isset($wp_filter[$tag]) )
is true (there was no onward filter in the list). It’s almost as if the action is no longer hooked which I suppose could be depending on how the session has been configured for the AJAX request. I’m an AJAX and WordPress newbie so I could be wrong!
If anyone has any insight I’d really appreciate it! Thanks in advance!