After producing a few designs in the bleeding edge versions of Kicad (see previous posts), I was smacked with some seriously painful side effects.
In particular, when updating the installation, migrating it to another system, or attempting to run a fresh install on another system, you design files are likely NOT going to be compatible. It is the nature of not working with stable releases.
After receiving a new computer at work, I went about the usual installation of the nightly builds. I copied my design files from one computer to the other, and loaded one up. BING! Errors! WHAAAT?
I was EVENTUALLY able to get into the relevant files with notepad++, and with a bit of googling and guesswork, was able to "fix" my files enough to get them to load. Even so, some library footprints simply do not work well.
If you have started to work exclusively with the .pretty library format, pay attention:
I decided to move back to only using stable releases for a while. The side effect of that is that designs made in the nightly build will have to be edited manually to get them back, and worse, anything using a .pretty component will need the component rolled back to the old format of .mod / .lib
I have yet to figure out how to roll back my SYMBOLS in the schematic editor (I dont have that many in the new format anyway), but have stumbled onto how to get those footprints back.