Permissions not being granted with Facebook App installed

I have been using the new Facebook SDK since it came out.

I have noticed that certain permissions do different things on different devices.

For instance publish_actions allows me to post to the timeline on newer Android devices while publish_stream is required for older ones.

I've gotten around this by asking for both permissions.

However I have also noticed that if the Facebook App is installed on the users phone prior to running the script, even asking for both permissions doesn't them me to post to the timeline.

Has anybody else come across these bugs?