The iPhone camera geotags photos you take using it. This is a nice feature, and I like it. But if you use iPhoto to get your pictures off the camera, it breaks them. This file was pulled using Image Capture

$ md5 Desktop/IMG_0115.JPG 
MD5 (Desktop/IMG_0115.JPG) = db9551d666e312dad10b01607b758bc1

$ exif Desktop/IMG_0115.JPG 
EXIF tags in 'Desktop/IMG_0115.JPG' ('Motorola' byte order):
--------------------+----------------------------------------------------------
Tag                 |Value                                                     
--------------------+----------------------------------------------------------
Manufacturer        |Apple                                                     
Model               |iPhone                                                    
Orientation         |right - top                                               
x-Resolution        |72.00                                                     
y-Resolution        |72.00                                                     
Resolution Unit     |Inch                                                      
Date and Time       |2008:07:14 09:39:31                                       
Compression         |JPEG compression                                          
Orientation         |right - top                                               
x-Resolution        |72.00                                                     
y-Resolution        |72.00                                                     
Resolution Unit     |Inch                                                      
FNumber             |f/2.8                                                     
Date and Time (origi|2008:07:14 09:39:31                                       
Date and Time (digit|2008:07:14 09:39:31                                       
Color Space         |Uncalibrated                                              
PixelXDimension     |1600                                                      
PixelYDimension     |1200                                                      
Gamma               |2.20                                                      
North or South Latit|N                                                         
Latitude            |51.00, 31.49, 0.00                                        
East or West Longitu|W                                                         
Longitude           |0.00, 5.25, 0.00                                          
--------------------+----------------------------------------------------------
EXIF data contains a thumbnail (4879 bytes).

And this file is the EXACT SAME PICTURE pulled using iPhoto

$ md5 /Users/tomi/Pictures/iPhoto/Modified/2008/14\ Jul\ 2008/IMG_0115.JPG 
MD5 (/Users/tomi/Pictures/iPhoto/Modified/2008/14 Jul 2008/IMG_0115.JPG) = 571f8966a47ac583026090b63d7cde2a

$ exif /Users/tomi/Pictures/iPhoto/Modified/2008/14\ Jul\ 2008/IMG_0115.JPG 
EXIF tags in '/Users/tomi/Pictures/iPhoto/Modified/2008/14 Jul 2008/IMG_0115.JPG' ('Motorola' byte order):
--------------------+----------------------------------------------------------
Tag                 |Value                                                     
--------------------+----------------------------------------------------------
Manufacturer        |Apple                                                     
Model               |iPhone                                                    
Orientation         |top - left                                                
x-Resolution        |72.00                                                     
y-Resolution        |72.00                                                     
Resolution Unit     |Inch                                                      
Software            |QuickTime 7.5                                             
Date and Time       |2008:07:14 09:40:28                                       
YCbCr Positioning   |centered                                                  
Compression         |JPEG compression                                          
x-Resolution        |72.00                                                     
y-Resolution        |72.00                                                     
Resolution Unit     |Inch                                                      
YCbCr Positioning   |centered                                                  
FNumber             |f/2.8                                                     
Exif Version        |Exif Version 2.2                                          
Date and Time (origi|2008:07:14 09:39:31                                       
Date and Time (digit|2008:07:14 09:39:31                                       
Color Space         |Uncalibrated                                              
Latitude            |51.00, 31.49, 0.00                                        
Longitude           |0.00, 5.25, 0.00                                          
--------------------+----------------------------------------------------------
EXIF data contains a thumbnail (2670 bytes).