If you are receiving an error message such as "Flickr#processSyncItem - Image 'IMG_0001' (ID=3072742062) Save Lastupdate failed meta:Changed machineTags:OK", please follow these directions to view the warning that occured just before this error message. The warning will tell you the part of the iPhoto item's meta data that PhotoCopy is having a problem with.

To find the warning, click on "View Log" in the bottom right of the main PhotoCopy window.
In the Lower list, expand the last row (Type=Sync) by clicking on the disclosure triange on the left of the row.
Scroll down to the bottom of the window. If the last entry has notes like "Image 'IMG_0001' (ID=3077664903) keywords changed from 'Aubrey Pam' to 'Aubrey Pam'"

then PhotoCopy is having problems with parsing the keywords for Image 'IMG_0001'. 

We are currently working on a fix for this problem. As a workaround, open iPhoto and examine the keywords assigned to Image 'IMG_0001'. In this case the keyword 'Pam' had a leading space ' Pam'. Removing that space in the keywords allowed PhotoCopy to continue with the copy. 

To edit keywords in iPhoto, choose the menu Window > Show Keywords. Then in the keywords window hit the 'Edit Keywords' button. Use this list to remove any leading or trailing spaces from the keywords for the Image which is having problems.

After changing the keyword, there is one more step to the workaround. You have to make a change to Image 'IMG_0001' so that PhotoCopy will pickup the changed keyword.

Open iPhoto
Find the image 'IMG_0001' and select it
Change the rating, (add or remove a star).
Quit iPhoto
Open iPhoto
Find the image 'IMG_0001' and select it
Change the rating back to what it was.
Quit iPhoto
Now run PhotoCopy and start a copy.