I have a MBA 2013 with a Thunderbold-Display (middle) and two USB 3.0 Display-Adapters (left and right).
After the upgrade to Mavericks, I have to adjust the positioning of the monitors after every restart.
This means: After a restart the Thunderbold-Display is set to be the left monitor, while the other two monitors are set to be the middle and right one.
Any suggestions? This setup worked with 10.8