Sharepoint 2007 to 2010 Upgrade - Visual Problem

I migrated the site from sharepoint 2007 to 2010, also did visual upgrade UIversion to 4. When I view some of lists there is still 2007 v开发者_JS百科isual skin, although the others are shown in 2010 skin. What could be the reason?

The reason is some of the pages are customized so they are unghosted in the database. Try reset to site definition option from Site Settings. You can also build a tool to do it programmatically using these API:

SPFile.RevertContentStream
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spfile.revertcontentstream.aspx