wordpress页面返回404

Question

I have a very strange problem.

The blog has a permalink structure /%category%/%title%/. Everything works fine for posts but when accessing pages by directly typing their URL, I get 404. I noticed this when checking the Google Webmasters Tools. The pages open fine when clicking on their link within the site.

The last thing I should mention is that the titles contain some non Latin characters but they are properly encoded.

Does WordPress check the referrer header and makes some decisions based on its value?

Look at the headers that Firefox sends when accessing the pade directly and it returns 404 and when clicking on internal link:

Host    localhost:8088
User-Agent  Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
Accept  text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language en-us,en;q=0.5
Accept-Encoding gzip, deflate
Accept-Charset  ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection  keep-alive

---

Host    localhost:8088
User-Agent  Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
Accept  text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language en-us,en;q=0.5
Accept-Encoding gzip, deflate
Accept-Charset  ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection  keep-alive
Referer http://localhost:8088/dani/

The only difference is the referer header. Very strange.

Answer 1

The problem turned out to be not in the referer header but in the casing of the utf-8 url parts. The internal links are bult with lower-case letters as:

http://localhost:8088/dani/%d0%b1%d0%bb%d0%be%d0%b3/

and the page titles have the same look. But when typing a URL in a browser, it encodes the string with upper-case letters as:

http://localhost:8088/dani/%D0%B1%D0%BB%D0%BE%D0%B3/

which doesn't match the title of the page.