I have extremely strange problem.
I had downloaded a .zip archive file and it didn't have an icon and wasn't associated with any program so I right clicked it > Open with > Open with other application >and i chose my archive manager... and when i extracted the archive I tryed to open one text file on my desktop and it tryed to open it with the archive manager.
Gnome version is 2.22.3 if this helps
I created new user and it works normally there.
EDIT: I think I found part of the problem. Every file's mime type is text/plain




