Make the website (at least login) also work with Firefox
Using Firefox (on Windows) I was unable to login. Also allowing Scopus to access Orcid did not work with Firefox. I had to start IE to do this .
The site does not play nicely with Firefox 21.0. Firefox is the world's third most popular browser and in a large part of sub-Saharan Africa the most popular browser. I understand that you cannot ensure compatibility with every browser, but this does seem to be a major oversight.
There are a number of privacy plug-ins for various browsers that prevent users from registering and logging into their ORCID record. The list of know plug-in issues is at http://support.orcid.org/knowledgebase/articles/159728-upgrade-your-browser and most can be resolved by white listing orcid.org with the plug-in.
Had the same problem and figured out that blocking "Google Analytics" via the "Ghostery" plug-in caused the trouble. Allowing "Google Analytics" temporarily solved the login and Scopus issues.