I had to take off all of the strings on my classic guitar for a certain thing, and when they all were off the nut fell down.
after i returned all the strings and the nut back on, the 6'th string(High e) has an dirty sound when i play it open. when i play on the 6th string on a certain note it sounds ok.
I suppose there is a problem with the nut, i tried to move it a bit up and down and still a dirty sound.

Thanks alot