I know this should be posted to the bug tracker, but it is the version you are about to release into the wild. There seems to be a bug with the math question authentication. Works in FF, but fails in IE6 and IE7.
If you try to post a second comment, you get the same math question the second time and it fails to authenticate. See test: http://road.cvaracing.org/roller/page/dave?entry=post_one This is a 2.1RC4 instance - just experimenting, so not sure how long this page will be available. Dave
