MySQL troubles
If you recently upgraded Mac OS X to 10.4 and MySQL didn’t play nice anymore with PHP applications like WordPress, this is why. I don’t want you to have to spend 2 hours figuring that out like I did. 
WordPress database error: [Table 'blog_comments' is marked as crashed and last (automatic?) repair failed]
SELECT * FROM blog_comments WHERE comment_post_ID = '46' AND comment_approved = '1' ORDER BY comment_date