I'm helping a school that has set up a guest wireless access vlan across multiple buildings. It works fine for everyone, including the one out-building that is connected via bridged mikrotik radios using nstreme (5ghz). That is, as long as they go out to the Internet it works perfect. However, if they attempt to access the guest login page on their sonic device (vlan 150/192.168.40.0/24 ), or a local (172.18.0.0/16) web-site in the main building, they get an initial hit on the page, as if it will load, but then it finally fails. Users on vlan 150 are able to ping devices on vlan1 and 150, just can't bring up web pages.
At the moment, I do not have any vlan configurations on the mikrotik wireless. We are using 433 boards and sr71 cards.