Missing Site Actions Menu after Sharepoint Backup or Restore

A couple weeks ago, I ran into a problem, it’s so annoying and stupid. I have a scenario that I must copy an entire Site Collection and restore it on another server. After I tried to backup all of site collection and then restore it on another server, all seems good and nothing’s error found. But when I hitting the front page, and click Site Action, some of menus are missing!

After a few days, I found that both of the source and destination server, are locked by default when you try to backup or restore by using STSADM. and you can check the site whether it’s locked or not by using this command.

and this command does unlock the site…

And, voila……. the Site Actions menu shown up again….!!!