Status update: Using the update from yesterday (May 15), I can get the videos from my DLNA server to play if I select Dolby Digital (NOT Plus) in the Settings->Audio->HDMI. However, if I select Auto-Detect, it still does the scratching/popping audio.
This seems to be a big deal that affects a lot of people. Why is Roku so unresponsive about it? At the very least, they should make down-grading an option until they figure out how to fix issues.
Are you referring to a firmware update, or an app update? (FYI, there was an RMP/RMP beta app compatibility update for OS10 released yesterday).
As for updates:
1) Roku uses users' devices as their involuntary stealth firmware QA department to provide cost savings etc: most devices sold at retail are configured to use the beta update servers, without informing the user or allow selection (opt-in/opt-out). This is also why they do very slow limited staggered rollouts for firmware updates.
3) Because of #1 and #2, information about the procedure/process for firmware downgrading/reverting/rollback is actively suppressed/edited/eliminated in the forums (along with the users that provide/share such information).
We (our devices) are their forever ongoing eternal active firmware QA department/beta test (this isnt unique to Roku FYI: e.g. Microsoft moved to this model several years ago), and they arent going to give that up, so we have to take whatever measures we deem necessary to limit the negative impact of firmware updates (downgrading, changing update servers, filtering update connections at gateway/firewall, limiting network/internet access, etc).