I have tried installing AUT-I9300XXUGNA5-20140129183554.zip and O2U-I9300XXUGNA5-20140224162541.zip on my S3. They both fail with "Installation aborted", but I have no problem installing cm-10.1.3-i9300.zip. I have tried both from external_sd and sideloading. Same problem.
I can see the information from the screen in /tmp/recovery.log:
-- Installing: /external_sd/O2U-I9300XXUGNA5-20140224162541.zip Finding update package... I:Update location: /external_sd/O2U-I9300XXUGNA5-20140224162541.zip Opening update package... Installing update... Installation aborted.
The most prominent difference between AUT&O2U and cm-10 is size: The AUT&O2U are around 1 GB whereas cm-10 is around 200 MB.
Can I somehow do the installation by hand through the shell, so I can see exactly why the two zips fail to install?