You might be right about just testing them and assuming they're standardized. I supposed a few carefully planned tests could show what happens when you change settings in your xmodmap to see if Qt is getting raw mouse events or if they are in fact going through X's button mappings first. I was just hoping someone had a definitive answer. I'm just messing around with creating a directory browser and thought it would be nice to enable those buttons for navigation.
Also just so you know, the left button/right button swap comment didnt come from me, I copied that text from the Qt 4.6 documentation for the Qt namespace
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