Tried to play contest, client crashes

[StackOverflow]

I joined a contest. -> http://fold.it/portal/node/995797

But when I try to play it. My client crashes (goes unresponsive and windows closes it)

[StackOverflow]

Looks like not all contests have this issue for me.

I tried this contest -> http://fold.it/portal/node/989263
And it works fine thus far