iTunes may unexpectedly quit when you try to synchronize folders containing pictures to your iPod. This can happen if you create two or more subfolders in a folder such as "My Pictures," and the names of subfolders contain fullwidth digits (0-9) of a 2-byte (Unicode) character set.
Examples of folder names that include these fullwidth digits:
This can happen with iTunes for Windows and any iPod with a color display.
Update to iTunes 6 or later or use the figures from a single-byte (Roman) character set to prevent this from occurring.