If you open http://feedback.textasticapp.com on an iPad, you will see the new mobile site. If I tap on the sign in button or on the "Sign in to leave comment" link, there's only a white rectangle on the top left visible. Here is a screenshot.
FYI: it does work on iPhone, but not on iPad.
Thanks, we fixed sign in issue on iPad.
Thanks, I can confirm that it works now!