I need to restore backup site in my dev environment
but after applying the command
stsadm -o restore -url http://localhost:8080 -filename sitebackup.bak
i got the error
Your backup is from a different version of Windows SharePoint Services and cannot be restored to a server running the current version. The backup file should be restored to a server with version '126.96.36.19935' or later.
Thank you to SharePointDevWiki i got the answer where to look for updates CU.
hope this works.