Give your browser cache a clear, LBH, or try a hard refresh (CTRL and F5). I checked my mule account (which is as normal as any other, e.g. not admin/mod) and saw the proper tabs. Here are two cache clearing procedures; I can find ones for other browsers as well.
If you use Firefox, do the following:
-Go to "Tools"
-Select "Options"
-Click the "Privacy" tab
-Look for "Private Data"
-Click "Clear Now"
-Make sure "Cache", "Cookies" and "Authenticated Sessions" are checked. Check nothing else unless you want to delete your history or saved passwords as well.
-Click "Clear Private Data Now"
-Close your browser and restart your computer.
If you use Internet Explorer 7, do the following:
-Go to "Tools"
-Click "Internet Options"
-On the "General" tab, look for "Browsing History"
-Click "Delete" near it
-Next to "Temporary Internet Files" click "Delete files"
-Next to "Cookies" click "Delete cookies"
-Close your browser and restart your computer