Post with the letters "psy" in it produce a 404 error

[nachocomar]

When trying to save a post that contains the word "Ipsylos" (anywhere in the post or alone) I get a 404 error.

[zamoose]

1) This has to be one of the strangest errors I've seen reported.

2) Do the posts get published and it's simply a matter of the admin screens getting screwed up?

3) Are you blogging in English or is it some other language?

[nachocomar]

1) :D
2) Post with the word Ipsylos in it do not get published, nor saved.
3) I'm blogging in Spanish, but a post with the word Ipsylos alone is enough to get the 404 error.

By the way, "Ipsylos" is a song from the album "Nyx secret" of the French power metal band "Wildpath". As far as I know, Ipsylos is an invented word.

[Otto42]

This is too weird. So I just had to try it. :)

Worked fine for me. I'd say that it's unrelated to the specific word "Ipsylos".

[g30rg3x]

Tested on different series
Series 2.0.x (2.0.10-RC3): Unable to reproduce
Series 2.1.x (2.1.3-RC3): Unable to reproduce
Series 2.2.x (2.2-bleeding): Unable to reproduce

Like Otto42 "Works For Me"

[zamoose]

Deactivate all your plugins, then reactivate them one at a time. See if one of those is at fault.

[nachocomar]

I limited the problem to the 3 letters "psy"; those letters are enough to get the 404 error.

I disabled ALL the plugins and have set the default theme. I also deleted the Spanish language file. So I tested a default Wordpress 2.1.2 installation and the problem continues.

This is so weird.

[nachocomar]

Now that I could limit the problem to those 3 letters I found this:

​http://trac.wordpress.org/ticket/2924

He didn't give a good description but I think that he was having the same problem.

[foolswisdom]

Nice investigation work!