I've noticed a problem with multiple 433AH's, in that I hard set an ethernet port to 100/full, no autonegotiate, but when I plug it into a switch (Cisco 3524, also hard set to 100 full), the mikrotik will set itself to 100/half. I can look, the checkboxes are as they should be, and I must manually uncheck the full duplex box, apply, check the full duplex box, and apply again. This will remain fixed until the next reboot.
Any ideas why this might be going on? I thought at first it might have been a fluke, but it's fairly consistent in not coming up right.