I've 2 PCs: the dektop is running Windows 7 and uses FF with Flash and Chrome. The other is a laptop and runs CentOS 7 (Linux) with Chrome (latest relaease).
This post only applies to the Yahoo version of the Klondike game. The Plinga version had it's share of DNS related problems but is fine now. About the FB version I have no information as I'm not playing using FB.
The desktop is doing fine 99% of the time measured from 2 days ago.
The laptop worked fine 100% of the time untill 2 days ago.
The laptop keeps getting the 502 Bad Gateway error message all the time since 2 days (and I try often). I even installed (a rather outdated, but still the latest Linux version) Adobe Flash to enable FF to load the game, but at no avail. The cache of FF had to be empty right after the Flash installation, so it's not cache related.
For sure one friend in the game mentioned (s)he could not play the game for 2 days because of this issue. With this friend, the problem seems to have gone away automagically or something has changed on his/her side.
I assume I'm the first one to report this serious glitch. If there is a discussion about this already, please ignore my post and support/report using the other duscussion.