Weird Bug "From" word goes 404 page

[eluser]weblizzer[/eluser]
Hello,

I just encounter some weird bug that I found on the CI. Where when I try to save a long text and when there is a word "from" It goes to 404 not on the form action....

Any idea? but when I tried it on the local host it does work.. Is there something wrong with the host provider or?

Thanks