If a name has diacritics, for instance [[Jose Ramos-Horta|José Ramos-Horta]], avoid the diacritics when naming an article. If a link has a diacritic, what page it links to depends on the character set the browser is set to. A UTF-8 browser goes to what looks to a Latin-1 browser as "Jos&itrema;&iques;&1/2; Ramos- Horta", whereas a Latin-1 browser goes to an article whose title has an invalid UTF-8 character.
I think our general consensus is that there should be an article titled without diacritics, or otherwise Anglicised ("Goedel", for example), and that this article should be a redirect to an article with the real title, diacritics and all.
If the title of the article with foreign characters does not appear correctly on your browser, then there's a bug in someone's software, either the browser's or Wikipedia's (or both). I just started tackling that issue in the new codebase; if there's a specific combination of wiki page, OS, and browser that cause you a problem, let me know and I'll use that as a test case for the new code. 0