A couple minor bugs/interface glitches
First, when I sign up for a Todoist account initially, during the signup process I get a missing image type error. Second, there seems to be an unnecessary period in this sentence: "Completing every 3 months starting 10 April will result in a due date 3 months from 10. April." Both bugs encountered in Google Chrome on OS X Mavericks. Screenshots: http://imgur.com/a/KdhqF
Thanks for the report, we will be sure to fix that grammar issue. As for the log in issue, is this still occurring? It may have something to do with your browser, are there any extensions that blog scripts or anything such as that?