Q: When I try to sign in to i photos it says: The iPhoto is locked, on a locked disk, or you do not have permission to make changes to it.

I have a fairly new laptop (MacBook Pro Jan 2013) and I don't see iPhoto on it. Did I do something wrong? I think these 2 issues are related(?)

Repair the permissions of the library by following the instructions here:

iPhoto 6 and later: Rebuilding the iPhoto library

This does not work.  I have the same duplicate problem (since I updated to mavericks).

Whether you use the Option/Command keys or not, you still get the same dialog box as described above. You do NOT get the alternate box in which you described.

For the record: I am using a 2009 20" imac (running 8GB instead of the stock 2GB) that has all the latest updates as they are offered.   I have always been able to open iPhoto prior to this upgrade.