I noticed that the scripts provided from http://wolverinex02.googlepages.com/emoticonsforblogger2 for writing equations on blogger stopped working.
The address of the public mimeTEX server is changed to /cgi-bin/mimetex.cgi? from Thursday, March15 2007.
2. Go to ‘Manage user script’ and uninstall ‘LaTex for Blogger’ script.
3. Download the script file latexforblogger.user.jsscript from http://wolverinex02.googlepages.com/emoticonsforblogger2 to the desktop.
4. Open the file in any text editor. Search for http://www.forkosh.com/mimetex.cgi? and replace that text with /cgi-bin/mimetex.cgi?
5. Save the file and drag it to a FireFox window to install. Thats it!
For modifying an existing blogger post with content, edit the post in HTML mode. Do the search and replace mentioned in step4. Preview the post and hopefully, the rendering should be up and running with the equations back in the blog as desired.
Hope it is useful.