i dont experience such problems. maybe try to contact your ISP
it's rather strange that you don't have these errors... It's an nginx 502-error, so it's server-side, so it should be the same for everybody...
Maybe you're just lucky
Yep i`m getting that too ocasionally, like 2 times /week. Looks like the forum needs a better hosting provider, or bigger bandwidth, in the 3-4 years we`ve grown into a big community, and many people post here so we need a bigger host and bigger bandwidth.