Hi firstly, I'm glad to use wp2.8. It's really amazing upgraded version.
But I got a question about the thumb, and I don't know whether it's general problem or just happened on me.
One day I posted a post with several picture which was written in Chinese letter(eg.中文.jpg) and the picture was fine , i could see it when I typed in its url(eg. http://www.mywebsite.com/wp-content/uploads/2009/06/中文.jpg) But it's not ok when I wanna see its thumbnail(eg.www.mywebsite.com/wp-content/uploads/2009/06/中文 - 150x150.jpg) I don't know what's wrong and I'm sure the function was ok in WP2.71
anyway thank you