Dear admin,
I have problem after upgrade 9.51 to 3.7, boot normally but i can’t login to the router i use routeros-x86 mthbrd tyan, no message error but if i type the keyboard always double character e.x
login : aaddmmiinn
Password :
I have other ways to remote via mac-telnet from other router but theres no solve the problem i still can’t login, pls help me.
-widi-
cool…
my god .. 
Just planned to upgrade to 3.7
Now waiting for your answer ?? Norm or anyone there ??
Rafiq…
i upgraded 3 386 form 3.4 to 3.7 without any problem and also 2 RB193 from 2.9.51 to 3.7
all works correctly
I upgrade about 100 PC (different types)to v3.7 in the last two days. Everyone boots up. There is some small bug with ip proxy (sent to support), but it seen every works fine.
I’m jut now upgrading about 10 routerboards from 2.9.x to 2.9.51 and then to 3.7 and no issues now.
Just I have some trangre behaviour with bridged interfaces acting as route after upgrading a loadbalancer 2.9.51 to 3.7 (I think because of a new behaviour of v3 bridges, I’m reacconditioning setups to have it working better than before).
I’ve also planned to upgrade 2.9.51 usermanager to 3.7, but after reading iniwidi post, I think I’ll wait for 3.8… I don’t want to race the highway twice in four hours just to connect a serial port…
yes 3.7 has a problem with proxy and hotspot ..
I just upgraded to 3.9 and the hotspot and web proxy are still not getting along well. 
I tried to turn off the web proxy, but it refuses to stay off. It starts up and won’t let hotspot redirects work.
This thread, http://forum.mikrotik.com/t/hotspot-redirect-blocked-by-mt-proxy/19962/1 has been covering this issue
more recently.