I am having issues exiting the system map, neither the xbox red button or the escape key work. Can still use the other xbox controls so it is not an issue of the controller not working at all. Also having issues with the basic discovery scanner failing to respond (set to secondary fire on my HOTAS. Dropping out of SC and back solves this though. Not sure if these are related to rift or not.
After 3 -4 hours of play I'd say there are a number of little bugs and issues that have crept into beta 3 both in general and Rift specific.
Regarding your system map issue, I had the exact same problem, but found a work around that seems to work reliably. When you want to exit the system map, use your trigger button to zoom right in, far enough that the info window on the left disappears, now zoom back out until the info window re-appears. At this point you should be able to use your d-pad down to select the exit button and press A. You may need different button presses if you've re-assigned them.
I've also noticed
1. Issues with thrusters not working, though had assumed it was due to enabling one of the UI windows, but I guess the Galaxy map might be a cause.
2. Pressing B on xbox control no longer exits out of most or any windows - e.g. station services. Instead you have to scroll down to the exit button.
3. When viewing the Station Services window, there are areas when looking to the left or right where the UI window dims and interactions (e.g. button presses) are no longer sent to the window. At first I thought it was the dk2 camera losing track, but there is a strange 'dead' area when looking left/right where the UI window is not active, yet look a bit further left/right and it comes back on again.
Thanks for all the replies regarding getting a dedicated hardware sub-forum, I'll try and remember to fire off a message next week.