They're always different, but right now it's like this:
The Lock is the soundtracks icon
Soundtracks and Rose are The Deposit icon (The Deposit is also The Deposit icon so that's good)
Missions is The Withdrawal icon (that might be normal)
Classes is the Combat Mastery icon
The Freelancer and Black Dusk are normal
Prelude is the Falcon icon
Does this have anything to do with UCP?