Dialog send - multiple friends

Can you explain. An example from 开发者_如何转开发the other site - it adds 2 users to the sending.

http://www.facebook.com/dialog/send?app_id=116412671734664&link=http://developers.facebook.com/docs/reference/dialogs/&redirect_uri=http://www.jetsetter.com/&to=100000910418225,590528674

Our link - adds only the first one.

http://www.facebook.com/dialog/send?app_id=136365146450254&link=http://developers.facebook.com/docs/reference/dialogs/&redirect_uri=http://belvg.info/cutandblow/&to=100000910418225,590528674

an you explain the reason of this? Maybe you have some guidlines of where should we search for the reason and how to fix this? Thanks!

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It's being worked on as a bug.

http://developers.facebook.com/bugs/314701778595814?