For those still having lockscreen/home button issues.
This is definitely an app backup issue. Go to your files app, delete all app backups, internal and sd card.
Reboot into recover, data wipe/factory reset, wipe cache, wipe delvik, format /system, flash original rom, then boot up....sign into google upon bootup. don't let any apps download (if some do it's okay), then reboot into recovery. wipe cache and delvik, flash 1.1 update. power up your phone and you should be good to go.
I originally had this running 100% and then I installed the ICS rom, went to flash back to this and got the lockscreen/home issue, then found a post back on page 30 or so and deleted all my app backups. And it worked.
When you say app backup do you mean from TiBu? because other than that i have no backups and still have the home button issue..
Thanks for reposting the information