wptdriver 298 broke private instances?

[pmeenan]

Only other thing that comes to mind is that both Firefox and Chrome need to get installed by wptdriver at instance start-up and they pull the installers down from my CDN. Looking at the CDN stats it looks like the bandwidth and request counts are normal but it's possible there was a network issue or something that caused it to fail.

Can you reboot the instance to see if that solves it? That should cause it to try the install again (though it really should try every hour regardless and should try repeatedly at startup but that may be a bug).