Over the course of large projects, blender updates at least a couple times. Over my DEEP Space project, blender went from 2.51 to 2.63 (from memory).
The project eventually died when I went to university and ran out of time, but before then, it was on it’s way out anyway due to a few things.
One of the large issues encountered in DEEP Space was that of blender updating. When blender changed from 2.56 to 2.57, a whole bunch of texturing things broke, other changes in blender’s internal file-structure required me to open, save and close all the project files on several occasions.
I am aware that the time over which I made DEEP Space was one where a lot of changes happened in blender, and generally, support for older files is better now.
So I guess my question is this:
When you start a big project, do you ‘freeze’ the version of blender you use? Or do you, every two months, spend a couple days updating things?