Ok guys i have been looking all over the place for this problem, i have done everything from wiping my computer, cleaning it, install and reinstalling everything, you name it i have done it(Dont do it, Not worth the hassle).
I have found and answer and it makes sence last night i was playing to 5amGMT everything was fine, i got to bed wake up log on and within 10secs Unity web player would crash, its because of the new grass update and apperently AMD Graphic card users are having this problem including me (Well atleast some of the older AMD Cards).
If your having the same problem let us know and if you have a solution or a fix or are waiting for the devs to fix this let me know your story.
Ps. Sorry i couldnt see a topic similar to this so i made a new one