I notice that the align view > orbit commands and shortcuts respect the angle increment set in preferences/interface but the align view > roll angle seems locked at 15 degrees, would this be correctable or considered a bug, or is it my setup only and something I need to reset?
I get the same behaviour (2.69 and 2.69.10, Linux 32-bit). I couldn’t find reports related to that by quickly searching with Google.
You could probably send a report and see if they overlooked that or if it’s the intended behaviour for some reason.