We have changed the default theme. And were forced to reset everyone.
If you liked one of the other options you can switch it back in your theme settings.
The reasoning was because the handy dandy side bar that I loved so much started to hurt me. Truly a sad love story. Romeo and Juliet for the 21st century.
But just like the suave forum users we are the; past is forgotten and we have gotten a new, shiny theme to put on our elbows

Take from that what you will about my character and moral fortitude
