I am recieving the same error message for all of my posts "404! Sorry this page does not exist" and Im not sure what I did to cause it. I was able to view the posts fine recently.
The only thing I have noticed is that all of my posts have the same permalink now which looks something like "www.website.com/rock". I admit I was messing around with permalinks for the different pages but I dont know now how to reset the posts or any permalinks. Even new posts now make this permalink connection with "www.website.com/rock".
Any advice would help I dont know much about permalinks and would be happy just to reset them.