No, blank page could be some error report you don't see, because you have showing errors switched off in PHP. Try to switch them on and investigate, what these users could meet.
go.html isn't a blank page, it contains ">>>" mark at least (and if it's used, it should contain some advanced customized text about redirection, so you should edit it before usage), and if this setting is disabled, exactly, it means, miniBB is not using it at all, but trying to redirect with its standard methods. |