I can confirm the 500er error. I got this error yesterday, during changing the SPAM properties (from 168 hours to 72 hours).
Hmm, to bad having no logs.
On my own server I get every few days simple-xml-errors during the search for a new version but nothing more. The lookup succeeds at the end but meanwhile the simple-xml-engine throws a bunch of errors because of invalid HTML-structures (not XML!). At that point I ask myself, if Github delivers from time to time error pages (HTML) when the script requests the Atom-feed.
… And I ask myself if that could have anything to do with our problems … but I don't know.
Have you updated your own forum and if yes, have you any problems?[/edit]
Trenne niemals Müll, denn er hat nur eine Silbe!