We have two SharePoint Web Application (IIS sites) one running on http port 80 and other on port 1234.
Web app on port 1234 has one site collection and few sub sites, document libraries, lists etc.
On this site collection, a weird issue is coming. If library/list settings page is opened, any links to open/edit Column names, view names or content name are not visible.
This effectively means user can create additional columns, but cannot edit them later because there are no visible links.
Even if a new list is created anywhere on this site collection, these links to listedit.aspx, ViewEdit.aspx, ManageContentType.aspx do not seem to appear as seen in screen shot.
So far I've checked that: listedit.aspx, ViewEdit.aspx, ManageContentType.aspx are not modified by comparing them from layouts folder of clean build SP2010 standalone installation
Any clues are appreciated.