This has been going on a while and driving me nuts!
When I try and go to /wp-admin to log in/access the dashboard - I am immediately redirected to the homepage - which then keeps loading/refreshing every couple of seconds.
Makes using the site as admin/getting to the dashboard near on impossible!
Have tried reinstalling WordPress and also checked .htaccess to make sure I am using only the basic/usual settings.
I have w3 total cache installed, and a Facebook plugin which adds a Facebook login option (mmmm).
I guess the immediate/obvious answer is to uninstall the plugins etc - but it is quite a popular site with a lot of users, I don't want to break the site if I can avoid it :( so was hoping someone might know an obvious cause of this I can try.