Upgrading Drupal

Should I delete upgrade.php and install.php after updating to 5.8?

Any other files that should be removed?

When I try to edit my themes I get

* warning: fopen(sites/default/files/.htaccess) [function.fopen]: failed to open stream: Permission denied in /home/dakarcad/public_html/webmastercritic.com/includes/file.inc on line 129.
* Security warning: Couldn't write .htaccess file. Please create a .htaccess file in your sites/default/files directory which contains the following lines:
SetHandler Drupal_Security_Do_Not_Remove_See_SA_2006_006
Options None
Options +FollowSymLinks

I know I'm fairly new to Drupal, so I guess I've made what appears to be a classic newbie boo-boo in upgrading my site from Drupal 5.7 to 5.8. That is, all of the content entered within the FAQ module is missing when you view that from the menu system. The content is all still there, of course, and can be reached from the back-end portions of Drupal. Furthermore, all of the custom URLs for that content setup through the Pathauto module are just fine. Which should mean that links provided in the XML sitemap or created by others linking to my site are just fine. (Crossing fingers!) Also, the categories and so forth I created in Taxonomy seem to be fine too.

What I'm confused on is the what and the where of correcting this short of removing all of that content and re-entering it. (Which I've had to do in some of my past upgrades, as I didn't know what else to do to correct it!) Somewhere in the database, but some help would be appreciated in where to look. Trying to compare the backup I made prior to this upgrade and what's there now might help, if I had any idea where to look.

Hi,

I am testing upgrading my site from 5.8 to 6.3 and I have found some issues. The biggest one, so far, is that the front page is displayed incorrectly.

In 5.8, when I go to the main page it shows only my first page (see http://www.duperval.com).

In my local installation, when I do the upgrade, the first page shows all of the recently updated pages from my site. This definitely not what I want.

What causes this?

I have my drupal 6 site running. I got a message about new 6.3 version how should i update my site to new version?

I installed drupal 6.2 in my pc. Now, iwant to upgrate it with drupal 6.3. How can i do that. I am beginner.