Post installation

Everything works fine but not all of a sudden I get this error when posting a new story/page.

user error: Duplicate entry '24' for key 1
query: INSERT INTO node (status, moderate, promote, sticky, title, body, format, uid, created, type, teaser, changed, nid) VALUES('1', '0', '1', '0', 'test', 'this is a test', '1', '1', '1149692821', 'story', 'this is a test', '1149692832', '24') in /opt/intranet/includes/database.mysql.inc on line 66.

Hello!
My first post on here!

Anyways, I recently installed Drupal and got everything working, but one thing is confusing me.
Whenever I add any HTML into for example a new page/node, Drupal adds protection around it upon sumbit which effectivly renders it useless.
For example, if I put this into a page:
<a href="http://www.example.com">example.com</a>
it replaces it with
<a href=\"http://www.example.com\">example.com</a>

Hi,

tac_lite displays by default all content which is not associated with tac_lite chosen vocabulary.

What is the simple way of reverting this into 'NOT displaying the content without tac_lite vocabulary' ?
I want to explicitely denote the accessible pages.

Going a bit further. Would it be difficult to set default tac_lite vocabulary term to be used when none is specified for given node?

Any thoughts why i can see rss aggregator blocks as administrator but as a general user i cant . Has me stumped !!

My site is hosted by a hosting service. I'm using PayPalPro module with ecommerce. I have "use ssl" enabled in PayPalPro settings. When trying to finalize a PayPalPro transaction, I get an error message from both FireFox and IE browsers that there is a domain name mismatch when the ssl certificate is used. (The certificate contains the domain name of my hosting service and my domain name is of course different.) I click "OK" to try to ignore the message and I'm directed to a web page at my web hosting service. What can I do to get past this problem?

I ´ve recently started to check out drupal and think it´s very nice. I have one problem i cannit solve, wich is userregistration from outside. I have joomla setup working nicely for userregistrration. It sends mail through my isp´s smtp-server. I expected it to work as easy in drupal, and have set the site-email-adress and so in the admin_config.

Is there something i´ve missed? I only get a white/blanc page after sending the registration.

It´s running on a fedora5-server, fully updated.

regards
/pi