This hotfix release fixes a critical bug in previous releases that causes loss of data. The issue is present in firmware images since 2.5, and affects users that have attached external storage. When storage is removed and then immediately reattached, files that were on the external storage were physically removed. If you are using the external storage, we recommend you do not remove your external storage device until this hotfix is applied.
Please also find the up-to-date instructions on manually updating your Lighthouse:
ORx 2.5.3 - it works.
Sometimes the WiFi dongle gets disconnected while buffing heavy videos. I experienced this issue for the following video 2 times.
A post was split to a new topic: Networking not working on Pi2 after booting 2.5.3 firmware