i've upgraded several devices from version 6.44.3 (RB3011, RB2011) but the problem is with the CHR, however i can connect via ssh without problem,
I use WinBox 3.18 without RADIUS
ludvik - On some specific and very rare case Ethernet interface on TILE routers could lock up. Now this problem is resolved;
ndbjorne, kobuki, smileymattj - Bugfix version (long-term) will be released as soon as possible;
eworm, matiaszon, toxmost, Stanleyssm, wpeople, petrb, lomayani - I recommend that you provide supout file to email@example.com in order to get more information about the problem that you are experiencing;
pacman88 - CRS3xx switches now can better handle traffic passing through the switch if interface speeds are different;
nmt1900 - Can you reproduce this problem once more? Actually. sounds that this was simply a coincidence and the problem was caused by something else besides static ARP entries;
raystream, nichky, LetMeRepair, proximus, Cha0s, 3bs, Vlad2, sterod, mserge, STEVEUK1, elgrandiegote - We can not seem to reproduce the problem with Winbox login. Can you provide more details? From which version did you upgrade your router? Do you, for example, use RADIUS for Winbox authorisation?
SimWhite, nuffrespect, w0lt, snake27, Hyperlight - Please try to add a new firewall rule at every end of the tunnel and see if it starts to work properly? The rule should be located at the top (at least before drop rules) of input firewall filter rules chain (/ip firewall filter add chain=input action=accept protocol=gre src-address=[address that is configured as a remote-address on your GRE tunnel interface]);
rifkytech, bleblas, marcperea, mducharme, nerxu, jwilkinson6028 - If you cannot login into your router by using API please make sure that you have updated API authentication script (https://wiki.mikrotik.com/wiki/Manual:API#Initial_login);
anav - Is this problem related to RouterOS v6.45.1 or this is simply a configuration related question?
OndrejHolas - We will resolve this problem as soon as possible;
markos222 - Currently fix is available only in v6.45. Fix will be backported to long-term versions aswell;
adonato - MIPS and MMIPS are two differnet architectures. Is it RB750 or RB750Gr3? Please name precise model.