Using Drupal 7 & Omega 3.x - Page Titles + Edit Tabs are not showing up on node content types!
it seems that it is a bug in omega. https://www.drupal.org/node/1906744 -- this took quite awhile to figure it out! The culprit was actually the "main content" block not being enabled on the blocks page. This was because I was primarily using context in positioning my blocks and left the default blocks page empty by not assigning anything. It seems that the theme has to detect the "main content" block in order to show the tabs. So the fix is just assigning the "main content" block back into the content region.