Installing Drupal

I don't know if this has to do with gojoingo directly, but when I create a new event through My events, when I hit submit I am greeted with Access Denied. I can fill in the venue and all requirements, but I can't create the node. Of a related nature, when I give send a friend request, the email link that is sent to the new friend gives an access denied when clicked on, however the frienship is still established. Otherwise, things seem to work normally.

Any advice?

Just an FYI from my experience:
I have been toying with Drupal for about a week now, and I have been so bold as to install a few extra modules. One slip move on my part, however, and I caused my entire drupal installation to stop responding!

I am getting close to where I want to be. I'm on the knife edge of deciding to go with 4.7.0 Beta4, or the latest stable 4.6. Most of 4.7 appears to be working; but I have one more AcidFree issue.

A required module for AcidFree is Filemanager. Is there a version that will work on 4.7? This could be a dealbreaker that puts me on 4.6. I'd hate to do that as things do seem to be working for the most part.

Drupal: 4.6.2
PHP: 4.4.2
MySQL: 4.0.25

We have installed a site on a new server which has quite a bit of content now. However the performance is dreadful. We have caching disabled and have the devel module installed. From that we can see there is one query that is taking incredibly long

107314.84 1 SELECT data, created, headers FROM cache WHERE cid = 'menu:3:en'

What we do not understand is

I recently went live with a site that I developed and tested with 4.6.3 - the site went live with 4.6.5. My custom template includes a dynamic 'login/logout' link in the header - if the vistor is authenticated, the link is to user/logout, if not, the php behind the link is print l(t('login'), 'user/login', array(), drupal_get_destination()).

After a new installation I get the following error:

Fatal error: Call to undefined function: mysql_real_escape_string() in c:\ibserver\www\drupal\includes\database.mysql.inc on line 239

Fatal error: Call to undefined function: mysql_real_escape_string() in c:\ibserver\www\drupal\includes\database.mysql.inc on line 239

I've searched for the problem and can't seem to find anything. I am running Apache 1.3.**, PHP 4, and MySQL 3.23.52.

Any help would be super.