Is this forum running on 14 Beta?
It seems that it is not. Beta 14 probably has that Markdown extension updated too and when I try to add a code snippet on this forum, it does not ask what language I want this snippet to be:
When I use my Beta 14, I am asked to specify the language:
That 'language' is auto generated. It only happens in Beta 14. So this is how I can say that this Forum is running Beta 13.
I hope this helps in some way. Maybe it is that Markdown extension that is broken?