My OTHER capacity is more than any of the others - music, photos, etc. what should I do?
- Restore from backup using iTunes
If no joy, restore as new without the backup, then sync manually the things you want back.
Shouldn't be more than about 1GB or so. If it's significantly larger, back up your phone and restore it (http://support.apple.com/kb/ht1414).
Retrieving data ...