D-Link posted release notes for the most recent DCS-825L firmware update. It looks like there were a few interim 1.02 versions released within a one week window. Here are all the changes that were added after the last v1.01 release:
Firmware: 1.02b3427 - Date: 12/27/2013- [New Feature] Improve boot-up speed
- [New Feature] Upgrade mydlink agent to v2.0.17-b49
Firmware: 1.02b3420 - Date: 12/20/2013- [New Feature] Support high/low temperature events for mydlink
- [Bug Fix] Fix the system music is unavailable issue
Firmware: 1.02b3418 - Date: 12/18/2013- [New Feature] Support Music Play from SD card
- [Enhancement] Turn up the volume of boot up music
- [Bug Fix] Fix the incorrect LED behavior while rebooting on AP-Client mode
DCS-825 - Cumulative Firmware Release Notes