After upgrading to 2.9 i get this error when trying to go to appearance -> editor and then selecting a file to edit.
(and yes i checked the path, and the file(s) do exist)
I upgraded wordpress automatic and i read that it would be wise to upgrade it again manually, so i did, but still the same error.
Anyone know what is causing this and how to fix it? I checked the wordpress database and it says it is up to date.