Searching for one letter returns extra empty post

Searching using just one letter isn’t really a good thing to do. Result wise, many posts should match the search query. On my site and testbed it does return results, I don’t think they are particularly valid, but there are results. So it sounds like something is up with your install, but unless it is causing other issues, I wouldn’t really worry about it.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)