The Thematic Blogtitle (in hooks-filter.php) uses the get_option template tag:
<div id="blog-title"><span><a href="<?php echo get_option('home') ?>/"...
This resets the language selection in multilingual blogs.
Using the bloginfo tag instead solves this problem:
<div id="blog-title"><span><a href="<?php echo get_option('home') ?>/"...
PS: Note that the trailing slash has also been removed.
Maybe something to change in the next version?
