Just wanted to drop by and let you know, in the si-captcha.php file, you have an extra </div> tag around line 456-457 which breaks layout for side bar login forms. It's located in the function si_captcha_bp_login_sidebar_form() area. I removed it and layout for my site is fixed. Without it, it was causing things to shift. Might want to update the code. Thanks for the plugin.