I think 3.0 is taking more memory and therefore is having issues on these rb112s? Just a guess. I notice with < 5mb of ram available things start going haywire.on RP112
i got 100% cpu usage alot
missing wireless interface on reboot
after a 3 min of using with hotspot the router stop responding
no ping nothing
NTP client doesn't works too.in MT 3.0beta5 queues is not working, and many times MT is making a disconnetion to winbox after some changes.