Yes...that's why there's a red warning in the tooltip on 1.8 versions The fix is to proceed by tiki-login_scr.php. If I missed some details the SysAdmin FAQ should help.
Register at tiki.org and you'll be able to use the account at any *.tiki.org site, thanks to the InterTiki feature. A valid email address is required to receive site notifications and occasional newsletters. You can opt out of these items at any time.
;){kind=link}