Was having absolutely no issues with my Decos.  Needed to update a bedtime in parental controls on Saturday night and saw that there was a firmware upgrade to the one referenced above (Release 38666).  Sunday, started having a ton of issues with the internet speeds no matter if it was on wifi or hardwired into the switch and then the router.  Did some tests with my AT&T modem and no issues there.  Turned off the Decos and bypassed them totally and no issues.  If I restart my AT&T router or the Decos, the speeds will be fine at first (250 MBps or so).  But over the next 15-20 mintues, the speeds will get slower and slower.  Tried this multiple times and got the same result.  Did a manual reset on the main Deco Sunday night and had to switch the designated main one to a different unit.  Speeds seemed to be fine.  This morning, had a flashing red on one of the units.  

Did a manual reset on each of the Decos this morning, which meant that I had to re-create the entire wireless network.  Not a huge deal if it would have fixed things.  It worked great for the first 10 minutes, but speeds are slowing down again.

None of these issues seemed to be there with the previous firmware.  Is there a way to revert back to a previous firmware to avoid these issues?  It looks like you can do it via the 192.168.68.1 portal, but where do you get the file?