I have upgraded a 2860 from 3.7.8 to 3.7.8.3 today and have had numerous issues. I have tried all three available versions and have had a few different issues.
I use a cisco VPN client and since upgrade, it is complaining about MTU size being too small (1280). I have checked and MTU size is still set to 1492.
I am load balancing with a 120 V2 and where before, it worked brilliantly, i am now finding all sorts of general internet instability across multiple devices.
It ages also taking ages (10+ mins) for the 120 to connect successfully, and then its failing.
Now. i cant connect on WAN 2 at all.

I cant find a link for old downloads, does anyone know off one?
I assume i can downgrade?
I am connecting with ADSL 2+ ANNEX a Showtime

Any ideas? Can i get the old firmware and reflash it?
I was previously on modem code 548006_544401

ftp://ftp.draytek.com/ although down at the moment but it was there 30 minutes ago.