If you're like me, and someone asks you for the URL to login to Blogger, you'll be like DUH. http://www.blogger.com . Who is buried in Grant's tomb, anyway? But, you would be wrong. With new Blogger, you are much better off logging in to https://www2.blogger.com/login.g . The latter is secure, and it uses the scripts written for New Blogger ("www2.blogger.com"). If you don't login thru the latter, consistently, you could have problems that come and go. Problems that you solve, temporarily, by clearing cache and cookies . Problems that you solve, partially, by checking security on your computer . Problems that you solve (when using Internet Explorer), maybe, by permitting cross-frame scripts from "Blogger.Com" (and specific Trusted web sites ). For best results, bookmark https://www2.blogger.com/login.g - and use it - consistently, after you clear cache and cookies . Also, see Help! My Blog Is Gone!: Login Problem for login problems of general ...
What Blogger won't tell you