Hi,
This is something to do with the fact that my page is called Poker @lerts (note, replace the @ with an a throughout this post). I can't link to it as the forums will throw a wobbly - please go to PokerDIY and click on RSS Feeds in the bottom link menu at the bottom of the page.
If you go to this page as a logged on user and click on Update (there is a role subscription module on there) or if I go in as Admin and try to update ANY module on that page then it redirects to a blank page and falls over (http://www.pokerdiy.com/Home/Poke) - ie. it truncates at the point where the word @lert starts).
So, if you misspell the URL (e.g. http://www.pokerdiy.com/Home/Pokerlerts/tabid/524/Default.aspx instead of http://www.pokerdiy.com/Home/Poker@lerts/tabid/524/Default.aspx (you know what I mean)) then this page functions fine.
There is some core DNN security function truncating my URL which prevents any postback from occuring and renders the page useless. To fix it I would have to rename my page but this will affect SEO and I really don't think this is desired behaviour. Anyone got a way around this? This bug manifests itself in many ways (ie. you can't say the word @lert on these very forums).