Strange Winbox problem on RB433(AH) with IC+IP175D switch

I’ve found a strange problem of ROS 5.x when connecting to all of RB433/RB433AH with switch chip IC+ IP175D on ethernet ports 2 and 3. The problem occurs only on those ports when connecting by MAC-address of RB with Winbox. Winbox shows inactive buttons, unknown interfaces, long delays when creating bridge or adding interfaces to it. Interestingly only ports 2 and 3 affected and only under ROS 5.x. Port1 always working without problems. Connecting Winbox to IP-address on ports 2 and 3 resolves problem, but really strange. Under ROS 4.17 problem not exist, all port works same. Tried different Winbox versions and ROS from 5.0 to 5.22 without success. Tried 3 different RB433/RB433AH with IC+ IP175D, same problem. Tried 5 different RB433/RB433AH with IC+ IP175C, no problem on all with any ROS. Anyone experiencing such problems?
Screen Shot 2013-01-07 at 10.57.34 PM.png

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He is using Mac OS X from what I see on the screenshot.

Yes. At home I’m using Winbox from WineBottler under OSX. But for NetInstall I use old Toshiba Portege 7220CT with Windows XP. But Winbox problem under ROS 5.x with IP175D persists under any OS. Anyone can confirm the problem with IC+IP175D?