Is there a script which can correct all compatibility breaks, (automatically looks what version of Blender the file was made with and adds whatever necessary to get it look like before)?
Example: Let's say normal map strength is now 10 times smaller. For files created prior to 2.67, just multiply the value with 10 after opening in a 2.67+ version, to get the effect the artist really created.
If not, is there a text file listing all those compatibility breaks so that we can understand why, when a file looks weird/wrong?