Perhaps a bug in v. 1.9.8.3: " user registration" does not work properly
I meantime installed Tikiwiki on the server of some other hoster, shared hosting.
From Fantastico. It is the basic verion of TikiWiki, hence user registration
not yet offered on the startpage.
In the admin ares of Tikiwiki, I tried as first action to add a new uswer.
If Fantastico in fact did all initil configuration, then this should work.
User registration did not work, exactly same problem like already described.
Now it tends to look like a bug... There are several recent posts related to this code segment of TIKIWIKI. Apparently, there is at least some problem. This is possibly related to recent versions of PHP and/or MySQL.
This part of the forums has apparently not enought visitors to advance with this problem analysis. So I will try to post a link to this in other locations.