Since few days im figthing with some problems on my wordpress. Posts display as normal on the main page but when you click on the title to see it on single page, it give 404 error. Same for comments. I tried switching off all the plugins but that didnt help. Ive also made an update to the newest version of WP, no effect and tried switching to different themes.
Plugins i use are: canonical url, all in one seo, flexi pages widget, google xml sitemaps, simple press forum.
Thank you for any advice
P.S. here is the address