The quick search breaks at the first non-ascii character.

Steps to reproduce:

• create a page named "Thöggele"
• wait until it is indexed
• try finding the page via quick search by entering "T" and "h" (everything is ok)
• press "ö" (you will see that nothing changes on the UI, especially the ö in Thöggele is not bold), and the search is not narrowed

Fix:

• in the file (3.1, similar in 3.0)
  confluence-3.1-std/confluence/WEB-INF/classes/com/atlassian/confluence/setup/atlassian-bundled-plugins.zip, and inside there
  auiplugin-2.0.2.1.jar
• patch the file
  js/atlassian/atlassian.js
  the function "escape" like this:

    339,341c339
  <                 return escape(string).replace(/%u\w{4}/gi, function (w) {
  <                     return unescape(w);
  <                 });
  ---
  >                 return encodeURIComponent(string);
  

• re-package the jar and zip and place it in the original file location, and restart confluence, and try again. It works now