UserAgent: Mozilla/5.0 (X11; CrOS armv7l 7978.74.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.103 Safari/537.36
Platform: 7978.74.0 (Official Build) stable-channel nyan_blaze

Steps to reproduce the problem:
1. Open browser
2. 
3. 

What is the expected behavior?
Upon launching the browser, mouse control becomes erratic with 1-2 lapses in control. There are also random mouse clicks with no input from the user. Within ~60 seconds, mouse control fails entirely and a reboot becomes necessary.

What went wrong?
Update to current stable version caused this.

Did this work before? Yes Before update to current stable version of Chrome OS

Chrome version: 50.0.2661.103  Channel: stable
OS Version: 7978.74.0
Flash Version: Shockwave Flash 21.0 r0