Few days ago I have noticed, all articles with all comments disappeared from my Blog/site.
Today I have finally found out after few days "battles" with hosting (they haven't found a problem) that permalinks in Pages do work properly but custom permalinks in Posts are the reason for not finding the article. You can check it here: http://paiyoujiplus.net/ingredients-and-side-effects/ (Nothing found). I have tried all regular stuff that can happen with upgrading WordPress or other changes. Not even deactivating Plugins have any effect. All the content is there in Administration, just this permalinks in post doesn't work.
Any idea? I am out of them.