I sometimes get confused when I am testing. I could imagine
a light red page background via CSS
a big yellow "beta" sticker in the right corner
a combination
...
It would also be good to add a sentence to the first page that explains the beta status, something like
This is the public beta version of [MathHub](http://mathhub.info).
It is for community testing the development version of MathHub
and giving a preview of coming features.
I sometimes get confused when I am testing. I could imagine
This site tracks the
devel
branch whereas the stable http://mathhub.info tracks themaster
branch.