Panels tabs are (like so many things in Drupal) pretty easy once you know the exact steps. Using Drupal 7.20, Panels version 7.x-3.3, Ctools 7.x-1.2. you can make a page that has horizontal tabs along the top. It doesn't require any additional modules.
Well I've started using Windows 8. My old laptop is creaking along and about to give up the ghost. I've been using Windows 7 64-bit edition on it and it has been steady as a rock for quite some time now. My desktop on the other hand is an MSI based AMD machine with Windows 7 32-bit on it. It has been running fairly well but stutters a whole bunch. 8 Gigs of RAM doesn't seem to help this beast a bit. I got a new hard drive (Seagate 1 Terrabyte 6 GB/second SATA) to see if that would help with the stuttering but it didn't. So after transferring everything to the new drive, I decided it
When making a copy of a drupal 7 site, I often need to disable outgoing emails. I found a useful module called maillog that does the job well. It also logs all emails so you can easily see what the site is sending out. You can find it at http://drupal.org/project/maillog
After enabling the module, you can configure it at admin/config/development/maillog
You can disable all email by unclicking the checkbox : Allow the e-mails to be sent.