Larry, I need more information...
Using what you said, I ran some tests using photos taken with my digital camera in iPhoto. My photos show the following information in the "information" sidebar:
•type of camera
•File size (MB)
•File type (jpeg)
Then I tried to email a photo to myself: I have tried: "share," "attach," "drag/drop" a photo into email and sent it to myself as a test. Once the photo arrives in my Mail inbox, I have tried various ways to add this "test" photo into iPhoto:
"Add to iphoto"
"drag into iphoto"
"export into iphoto"
Each time, iphoto created the photo with "today's date." In the past, I would get an alert: Photo already exists in iphoto, do you still want to import? Duplicate or Cancel
Can you elaborate on, "if the photo properties are present and correctly formatted then iPhoto uses them."
When I drag a photo to the desktop and double-click to preview the photo, the top of the preview window says:
P1009.jpg -- locked (gray lettering of the word "locked")
Is there a setting I need to change to "unlock" the properties of my photos?*
*My original post focuses on importing photos sent from other people. I am hoping if I can solve the matter with my own photos, other photos will import with original dates created, too.
Here is a screenshot of what metadata iPhoto 11 displays compared to older iPhotos:
iPhoto does not show all of the available EXIF or ITPC data that's available. You can use EXIF Viewer to view the EXIF data in an image file. The developer had discontinued the app but the last available version can be downloaded from Toad's Cellar.
Update: I right-clicked a photo on my desk-top, clicked the lock in the lower right corner to unlock, then draged the photo into iphoto. I got a pop-up: Would you like to import the following duplicate photo? Cancel, don't import, import
How do I make a global change to "unlock" photos so they will import and maintain the original created date?
I have a similar issue. When I "add to iPhoto" from within the message in Mail, the date of the photo changes to the date it was added to iPhoto, not the date it was taken. The date info is deleted from the EXIF file when the photo is added to iPhoto in this manner. On the other hand, when I click and drag the photo to iPhoto in the dock, the original date and EXIF data are preserved.