I've been hit a second time by this! On Play My Code we have that the Google bot tries to setup games for playing, and the JS crashes. So we just disable the setup code for web crawlers. After the last release, this has mysteriously stopped working. Turns out the problem is because I moved the script loading into it's own function, to localize variables, so my internal variables don't clash with those in scripts. One of those scripts uses a global variable, but it's not declared. So it breaks, with no warning! This post is from -- http://socoder.net/index.php?topic=2758