I keep getting random "502 Bad Gateway - nginx" errors cropping up on a clients website when using Cart Throb.
For example I tried to install the example templates & chanmels inside Cart Throb, but it through the 502 error, when it got to this URL:
It also does it sometimes when a customer pays for something, using the SagePay gateway.
What could be causing this? I've tried turning off secure forms in the settings and its still doing it.