2 Jul 17, 2007 22:15
Unfortunately this happens more often when upgrading from a 0.9.x version to 1.9.x. What happens is the that the charset of the database no longer corresponds with the blog's. Fortunately no data is lost.
Here are some links from the forum to get you started solving the problem:
and in the [url=http://forums.b2evolution.net/viewforum.php?f=22]Internationalization and Localization[/url] part of this forum.