[support] Unable to sign in

[Steve Edwards]

I was working on a site tonight, and when I went to do something on another page (I don't remember which one exactly) I was signed 
out, and got the Access Denied error.  Then, when I tried to sign in, the user ID and password would just disappear as if I never 
signed in in the first place.  I tried in FF, IE, and Opera, and got the same in all places.  Has anybody seen this and know what 
causes it?  I've had this happen on another Drupal site, but I'm not sure how I got past it.

Thanks.

Steve