If you're getting stuck in an endless loop when trying to login to your WordPress control panel using Firefox, and you're sure you're entering the right credentials, the issue is most likely a bug in the coding related to cookies.  I've lost hours and probably a lot of hair trying to overcome this, but thanks to a post by richtelford buried deep in the WordPress forums (http://mu.wordpress.org/forums/topic/11865?replies=2) there is a fix.  A painfully simple one…

Shifting websites between servers and installing applications such as WordPress is a common task for web designers, and sooner or later you'll need to set or reconfigure the absolute path for the server. PHP offers a nifty function to display this for you with a small line of code. 

A common point overlooked when setting a website live with FLV or F4V videos embedded is setting the MIME types in IIS.  Without doing this you'll be left with a big empty space of nothingness where your video should play.

Without further ado, I present to you a guide to overcome this….