Apple has released the Thunderbolt Display Firmware Update for the Thunderbolt Display released earlier this year.
This update addresses a fan noise issue affecting a small number of Apple Thunderbolt Displays and improves stability.
The updater application will be installed in the Utilities folder inside the Application folder and will be launched automatically when you close this installer.
Please follow the instructions in the updater application to complete the update process.
The update totals 942KB and can be downloaded direct from Apple, or from Software Update for eligible users.