I just upgraded my blog and it seems it doesn't keep the css I add to the stylesheet. I add some random thing like:
Then I deactivate the theme and active an other one... Finally to re-activate the theme I first deativated... Now when I go back to the edit css page I no longer find what I added but just a empty file with the heading info as it was before.
Is this normal? Yes I notice the revisions section but I do not find this helpful at all if you got css edits for multiple themes...
Is to have simply a dropdown menu on that page from which you can select the stylesheets you made and of course you should be able to delete them as well!
Edit: I just found out this is part of the Jet Pack plugin.