Hey just alerting of two types of crashes going on here.
1 - Going to full screen in Scene View (Instantly crashes).
2 - Going to Full Screen Game View then making it small again crashes.
According to @scheichs
3 - Attach a tab (e.g. new inspector tab) to game view then closing it crashes editor
Every beta has same crashes!!! I had exactly same crash in 5.2 beta. WHY???
Bug report case #s?
Which platform?
Just adding another instance to this
3 - Attach a tab (e.g. new inspector tab) to game view then closing it crashes editor
Hey Alex, I didn’t think I needed to report a bug report as it will happen even with empty scenes on new project for me.
So I figured may as well just let you know.
And this is on PC.
Bug report it and post the # here.
It would be nice to have a link to the bug reporter in the openening post of each new beta version, e.g. here
http://forum.unity3d.com/threads/usage-of-the-beta-forum.357362/
I only found the issue tracker where I can vote for issues.
EDIT: Ok, I googled it. You have to submit from within Unity. I can remember that I have used it long time ago 
My case # is
Case 733353
Bug closed as duplicate, but other bug should already be fixed and on its way into the build. (Which one it lands in is still in the air, but it’s coming). If it’s not there by b3, please re-open.
We ask for this, because sometimes it’s not a simple step by step repro and more context/environment/etc needs to be known. That’s why we ask for the full report as it increases the likelihood of us being able to reproduce.
makes sense. From now on I’ll do that for y’all.
And awesome, glad the bug is taken care of.
@ - just letting you know the Window bug is still happening in Beta 2.
The bug seems to be not correctly dealt with, having the QA folk re-process and get it back in the system.
Alrighty, sounds good! Just figured I’d let you know. Thanks Alex.
Follow up - the linked bug was closed fixed but not noted as to reasoning/validation. So it should be in b3.
@ - Reported anoter bug Still happening in B3… Sorry for being annoying, just letting u no.
new case # is
Case 737096
Wanted to add I’m still seeing these crashes in beta 3 as well. Simple repro:
Open Unity, right click the Scene View tab, click Maximize. Crash.
Thought from a glance at the crash stack it was related to something else.
A fix for this should be on its way into the build, but won’t make beta 4.