Search function

Its been a while since I've participated on the site but I wanted to do a little research while I was out of town. I signed in, clicked the search button and the site wanted me to sign in again. After doing so I was told that my sign in failed too many times and that I was temporarily blocked from signing in. This happened every time I tried to do a search. I'm I doing something wrong or has something changed?

The site is experiencing some software problems. Give it a few hours and hopefully things will be back to normal.