3
Had the same issue so I had to rollback.....again...
Xoops is a fantastic CMS mad by some really great people, just want to make that clear before I say;
All those problems arising with updates might take all the fun out of Xoops:ing. I feel that I have reached my limit of problems - so I will not update my websites anymore. I will make the site work and just ignore the updates.
Sorry if I sound negative, but after having endless problems with either bugs in the code, incompatible modules between updates, or trashed or malfunctioning templates, my good mood is gone with the wind.