Hi @Marruger, thanks for the feedback 
Are you able to try QGC 4.1.7?
That’s our latest recommended version (for all systems)
That’s a known issue - at the moment the Log Browser works for our upcoming flight controller (since it runs off of the onboard computer), but unfortunately doesn’t yet work for Pixhawks because we haven’t finalised the mechanism for getting the log files off them.
That’s unexpected - I’ve managed to replicate the issue (and raised it here) but it seems to be browser-dependent. Could you specify which browser and OS you’re using, so I can add them to the list of currently problematic configurations?
In the meantime the underlying service seems to be working fine, so you can access it via Tools/Available Services in the sidebar (it just won’t have the page header).
By the way, are you ok if I make this into a public post? It doesn’t seem to include anything private, and others could potentially benefit from the information / discussion