Whenever I replace the com.apple.springboard.plist and set permissions to 0755, I restart my iPhone and it won't boot back up. It's not a big deal because all I have to do is restore, but why is my iPhone doing this? I know it has something to do with SummerBoard Alpha release because the "touchFREE" jailbreak method works fine! It's only after I install the SummerBoard stuff.You replace the existing file. And remember set octal permissions to 0755.
I also noticed that without installing com.apple.springboard.plist SummerBoard will be inactive (It says at the bottom in SMBPrefs).
I wish someone would just go ahead and upload the new Alpha SummerBoard to Installer so we can install it from there.