Currently Being ModeratedDec 1, 2012 7:13 AM (in response to Guy UK)
After a lot of searching, tweaks and hair pulling, I discovered that every single preferences file inside user/Library/Containers/com.apple.iPhoto/ had somehow become unwriteable by "me" despite having ensured permissions were correct on all of them. I even reset ACLs and permissions in the Reset Password application that lies within Terminal available via a CMD R reboot into Recovery mode.
The solution was to pretty much delete all of the files until iPhoto was happy to launch. I had to use Terminal to unhide files including the .GlobalPreferences.plist file that resides within this folder.
Interestingly, on another machine that is still on 10.7.4 and iPhoto 9.3.1 the com.apple.iPhoto folder doesn't exist within Containers so the explanation may lie within the 10.7.5 / iPhoto 9.4.2 updates. All of the files that iPhoto was having problems with were aliases that were created at the same time as the updates. After deleting them, iPhoto recreated them in a slightly different way and is now happy with them.
I'm leaving this up in case anyone else comes across the problem of iPhoto not opening and reporting a crash error of files not being able to be saved due to them already existing in the target destination (...couldn't save the file x in Folder y because it already exists).
Currently Being ModeratedNov 2, 2013 11:52 AM (in response to Guy UK)
I'm having the same problems. iPhoto and other applications using 'picture' like Preview won't open
in al my accounts except my own. For 1,5 years now. I'm going to try this method but will I have to
delete every file for every user and programme again? This certainly is going to be a lot of work.