Since 3.3.0, a typo in the code made this button disappear from the main page.
Patch is here: http://phpmyadmin.git.sourceforge.net/git/gitweb.cgi?p=phpmyadmin/phpmyadmin;a=commitdiff;h=767d16a8fa52a2d9ee30e3ed15b2f83c398bc027#patch2
Fixed for 3.3.2
Patch is here:
http://phpmyadmin.git.sourceforge.net/git/gitweb.cgi?p=phpmyadmin/phpmyadmin;a=commitdiff;h=767d16a8fa52a2d9ee30e3ed15b2f83c398bc027#patch2
Fixed for 3.3.2