Last modified: 2009-06-23 09:11:19 UTC
The Ajax search suggestion/TitleKey index seems broken on enwiki. Typing "f" in the search field and I get "france" , "Football...", "federal..." as first suggestions instead of the expected alphabetic order. Could running extensions/TitleKey/rebuildTitleKeys.php help? Related titleKey bugs: bug 17909 and bug 19354.
enwiki isn't using TitleKey anymore, it's on the Lucene suggestions.
It is intentionally not alphabetical but sorted by number of links to give more obvious suggestions first. Please report if there are any further issues, going to close it for now.