I have a SSL site using mixed authentication, both windows and FBA is working fine. The FBA pages under site settings all work fine. I created a new page and added the Membership Request webpart and immediately got an error. This was in the logfile:
System.Web.HttpException: Could not find the specified membership provider.
I was able to add the Change Password and Password Recovery web parts, however using them generates NullReferenceExceptions.
Any idea what could be going on here?