The Palm Tungsten T3 was a famously innovative device with an infamous number of quirks. In addition to the Tungsten T3 DIA Compatibility Update designed to improve app compatibility with the sliding display, a second update was released to fix bugs with SD card and audio performance.
This update is quite large (15MB), so if you do not experience any issues with your Tungsten T3, it is recommended to forego the update to save internal storage space. Otherwise, you must install both the global
T3Update.prc and the PRC associated with your chosen language.