Vista - File disappear after rename

I use Vista Ultimate with the Chinese font. Using Windows Explorer, renaming
a file of a Chinese file name to a differnt name will often make the file
disappear from Windows Explore. For example, rename <fileName-北京.mp3> to
<fileName-上海.mp3> will sometimes make the file disppear. Redo-Rename will
bring the file back.

If after typing the new file name, instead of hittin the return key to
effect the change I click the mouse on a different spot in Explorer, then the
change took effect. But this is not consistent. I just had better luck if I
click instead of hitting the return key.