Paddy,
Originally the G4 Main Drive was partitioned into a WORK and OS Partition. The OS Partition became too small to hold all the photos. So, iPhoto Library #4 is on the WORK partition. And a back up from a few days ago is on the internal drive because it's much larger. Is that what you mean by "Do you have a backup of the main library?"
Ok...just for clarity, since I'm not exactly sure - what is your set up? Two internal drives? One the working/main drive (partitioned in two) and one the backup? Or am I missing something? Glad to know that you've got a backup. Have you tried pointing iPhoto to its library?
QUOTE
Once a month my wife makes a copy of her WORK folder and stores it there too.
The internal drive has a System folder and applications but it's iPhoto v2 and Safari v1 !!
Isn't there a way to open iPhoto and lead it to the Library folder you want?
I will study the link you gave me. Seems they had the same issue.
Try launching iPhoto and holding down the Option key as you do. It should ask you where the iPhoto Library is.
If it's still complaining, you can create a NEW library and then import all your photos into it. A pain to be sure (and I guess you'd lose all your changes) but at least you would have all your photos.
This kind of ridiculous behaviour is one of the reasons I've never used iPhoto for anything other than casual browsing. (I use Lightroom)