1 - Unknown
2a - The screen saver directory and files is often one of those things checked by an OTA update. Anything that removes, moves, or renames them will cause that to fail.
2b - If the font hack only adds files, then it should not cause a problem. If it removes, moves or renames them, see: 2a.
3a - Unknown.
3b - You can never go wrong keeping your own backups.
They are your files, you changed them, who else should back them up?
@peter12345: 3 because of 2.
Last edited by knc1; 10-17-2012 at 08:03 AM.