The fb_example module has code for _node_insert and _node_update and in there they set the site's logo to be part of content streamed to the wall.
but, as far as i can tell the example code is wrong/out of date as changing code in these hooks has no impact on the content sent. Instead i believe the correct hook code to use is this: hook_fb_stream(). In there i can set $params. I am able to modify $param and see these changes posted to my wall; but:
1. i am not sure what $param value to set to send an image
2. my site's logo is being sent but i do not see in the code anywhere where this is done and it is certainly not in the $param variable in the fb_stream_post_on_shutdown() function.
Any hints how to override my sites logo being sent and send the image i want to send?
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