Symptom
When you sync a contact that you updated on your mobile phone to your computer using iSync, information in some of the fields is truncated in Address Book.
Solution
For best results, only edit contact information in Address Book.
Additional information
Because of the limited memory and display space on most phones, some contact information and event data may be truncated when synchronized using iSync.
If a truncated field is modified on the phone and then synched using iSync, the modified information on the phone will overwrite the information in Address Book, resulting in truncated information in Address Book.
This is correct behavior because when determining which information is to be kept, the most recently modified version is the one that is kept. However, due to limitations of the phone noted above, this may result in some undesired results in Address Book, or other applications where field length is not an issue.
Only fields that have been modified on the phone will be synced. If you have an Address Book contact where the first and last name were truncated on a sync to the phone, and the last name is edited on the phone and you sync again, only the last name field will be sent back in a truncated form to Address Book. The first name will not be changed.