I'm running 1.28 by shibby (5x101-en Mega) on an ASUS rt-n66u.
When I enable the Captive Portal feature it works fine in the beginning, but always after a short time web pages stop loading. This doesn't seem to happen simultaneously for all computers on the wifi - ie some remain unaffected longer than others, possibly forever but I'm not sure.
Things immediately start working again if I go to the router settings page (which I can still access) and click the "save" button on the Captive Portal page, which I assume restarts the service even though I don't change any settings. A short while later, however, it will break down again.
I'm sure there are some logs or something I can provide that would be helpful, but I don't know what so just let me know what would be good and I'll grab it.
Also if this is the wrong place (maybe I should be posting on shibby's site?), please let me know :)
Thanks in advance!