For anyone with a blog on iPowerWeb, they seem oblivious to the problem caused by the bug discussed here: http://wordpress.org/support/topic/154622?replies=15 and documented by MySQL here: http://bugs.mysql.com/bug.php?id=32202
I just finished a live chat with a very courteous but entirely unhelpful woman named Sonja. As far as they are concerned, MySQL 5.0.51a is not the problem. Also, in spite of what they might tell you, that IS what they are running. Put the following in a PHP page with the appropriate variables set to the correct values for your database and see what you get.
$link = mysql_connect($dbhost, $dbuser, $dbpassword);
printf("MySQL server version: %s\n", mysql_get_server_info());
As long as the version of WordPress being used is not the latest version, they will not even consider the possibility that they need to do anything. I'll update my copy of WP to 2.5 and see if they are any more receptive after that, but I won't hold my breath. If anyone else is using them as their host, please send them an e-mail asking them to upgrade MySQL.