If you are using Firmware V2.09 please update to V2.10 ASAP. There was a bug introduced (unintentionally) that caused LCD brightness always default to Auto no matter what setting was used. This and few other minor bugs are now fixed in 2.10. Huge thanks to William P. for bringing it to my attention. You can download latest firmware and source code as usually from Technical Data page.
This is great time to upgrade your Xronos clock as we added RF kit as well as limit number of Infrared Remote kits to our online store! Also all bare PCBs are now discounted at $3 a piece!