I messed up with some .h files some days ago and since then I have strange issues with my Linux Mint 17.
I cannot open my Trash, I get an error saying something like "sorry could not display all the contents of trash /// operation not supported". If I try to open Computer, I get a similar "not supported" error.
Moreover, I can't change the theme (it ignores every time I select a theme) nor the image of some icons, folders... I also lack things that I assume that should come by defect, e.g. I cannot access to the Chat Room in the Welcome Screen.
I have done quite a lot of search of these problems, but none of the solutions worked for me. I am of course ready to share the output of any command