To all who updated to v1.2-2 and facing a crash of the springboard layout.
To prevent from spending a lot of work and time:
Instead of re-arranging of all icons and folders just uninstall Dockshift and your layout will be fine again.
Prior to installing Dockshift again also delete the relevant plist in var/mobile/Library/Preferences
Doing so you'll be fine to update to v1.2-4
If you're still on v1.0-6 you are good to update to v 1.2-4 without facing any troubles.
I had to rearrange everything yesterday after I upgraded, and then after I "rolled back" to the new (old) version today, I had to fix everything all over again... It was all rather annoying.